This is a list of rivers of Wales, organised

geographical Geography (from Greek: , ''geographia''. Combination of Greek words ‘Geo’ (The Earth) and ‘Graphien’ (to describe), literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, and ...

ly. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the

River Wye The River Wye (; cy, Afon Gwy ) is the fourth-longest river in the UK, stretching some from its source on Plynlimon in mid Wales to the Severn estuary. For much of its length the river forms part of the border between England and Wales ...

from the

River Severn , name_etymology = , image = SevernFromCastleCB.JPG , image_size = 288 , image_caption = The river seen from Shrewsbury Castle , map = RiverSevernMap.jpg , map_size = 288 , map_ ...

. Tributaries are listed down the page in an upstream direction, starting with those closest to the sea. The

main stem In hydrology, a mainstem (or trunk) is "the primary downstream segment of a river, as contrasted to its tributaries". Water enters the mainstem from the river's drainage basin, the land area through which the mainstem and its tributaries flow.. ...

(or principal) river of a catchment is given, left-bank tributaries are indicated by (L), and right-bank tributaries by (R). Note that, in general usage, the 'left (or right) bank of a river' refers to the left (or right) hand bank as seen when looking downstream. Where a named river is formed by the confluence of two differently named rivers, these are labelled as (Ls) and (Rs) for the left and right forks. A prime example is the formation of the

River Taff The River Taff ( cy, Afon Taf) is a river in Wales. It rises as two rivers in the Brecon Beacons; the Taf Fechan (''little Taff'') and the Taf Fawr (''great Taff'') before becoming one just north of Merthyr Tydfil. Its confluence with the ...

from the Taf Fawr and the Taf Fechan at Cefn Coed-y-cymmer. The list includes more or less every watercourse named on

Ordnance Survey Ordnance Survey (OS) is the national mapping agency for Great Britain. The agency's name indicates its original military purpose (see ordnance and surveying), which was to map Scotland in the wake of the Jacobite rising of 1745. There was ...

mapping and thus many of the

main river Main rivers () are a statutory type of watercourse in England and Wales, usually larger streams and rivers, but also some smaller watercourses. A main river is designated by being marked as such on a main river map, and can include any structure o ...

s of

Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the ...

(as defined by

Natural Resources Wales Natural Resources Wales ( cy, Cyfoeth Naturiol Cymru) is a Welsh Government sponsored body, which became operational from 1 April 2013, when it took over the management of the natural resources of Wales. It was formed from a merger of the Coun ...

). Difficulties arise otherwise in determining what should and what should not be included. Certain names are encountered frequently and particular care should be taken to differentiate between the various occurrences of Clydach, Clywedog and of Dulas for example as well as those whose names refer perhaps to the colour of their waters e.g. Afon ''Goch'' (''red'' river), Afon ''Ddu'' (''black/dark'' river) and Afon ''Wen'' (''white/light'' river).

Mainland rivers flowing into Liverpool Bay

''From Dee Estuary to Garth Pier,

Bangor, Gwynedd Bangor (; ) is a cathedral city and community in Gwynedd, North Wales. It is the oldest city in Wales. Historically part of Caernarfonshire, it had a population of 18,322 in 2019, according to the Office for National Statistics. Landmark ...

Dee catchment

River Dee, Wales The River Dee ( cy, Afon Dyfrdwy, la, Deva Fluvius) is a river in the United Kingdom. It flows through parts of both Wales and England, forming part of the border between the two countries. The river rises in Snowdonia, Wales, flows east via ...

(Afon Dyfrdwy) ** Nant-y-fflint (L) (flows into Dee Estuary) ** Wepre Brook (L) (flows into Dee Estuary) **

Aldford Brook Aldford is a village and former civil parish, now in the parish of Aldford and Saighton, in the county of Cheshire, England. (). The village is approximately to the south of Chester, on the east bank of the River Dee. The Aldford Brook joins ...

(R) (wholly in England) ** River Alyn (L) (Afon Alun / River Alun) *** River Cegidog (R) (Afon Cegidog) **** Nant-y-Ffrith (R) *** River Terrig (R) (Afon Terrig) ** Worthenbury Brook (R) *** Emral Brook (Ls) *** Wych Brook (Rs) (formerly known as the "River Elfe") **** Red Brook (L) **

River Clywedog The River Clywedog is a river in Wrexham County Borough, Wales. Its uses have been watering crops, powering industrial machinery but is now used as walking trails or geography trips. The river originates to the west of Wrexham, and joins the ...

(L) (Afon Clywedog) *** River Gwenfro (L) (Afon Gwenfro) ***

Glanyrafon Brook Aberystwyth () is a university and seaside town as well as a community in Ceredigion, Wales. Located in the historic county of Cardiganshire, means "the mouth of the Ystwyth". Aberystwyth University has been a major educational location in ...

(R) **** Black Brook (R) (Afon Ddu) **

Shell Brook Shell River, formerly Shell Brook, is a river in the north-central region of the Canadian province of Saskatchewan. The river begins at Big Shell Lake and travels in an easterly direction and flows into the Sturgeon River north of the city ...

(R) ** River Ceiriog (R) (Afon Ceiriog) (head of river is Ceiriog Ddu) *** River Teirw (L) (Afon Teirw) *** Nant Sarffle (R) *** Nant Cwm-y-geifr (R) *** Nant Cwm-llawenog (R) *** Nant Rhydwilym (R) ** River Eitha (L) (Afon Eitha) ** Eglwyseg River (L) ** Afon Morwynion (L) **

River Alwen A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of ...

(L) (Afon Alwen) *** Afon Ceirw (R) *** Merddwr (R) (known as Nant Lleidiog upstream) **** Afon Medrad (R) *** Afon Brenig (L) ** Afon Trystion (R) **

Afon Llynor This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) **

Afon Ceidiog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** Hirnant (R) ** Afon Tryweryn (L) (River Tryweryn) *** Afon Mynach (Dee) (L) ***

Afon Hesgyn This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an ups ...

(L) *** Afon Gelyn (L) (flows into

Llyn Celyn Llyn Celyn () is a reservoir constructed between 1960 and 1965 in the valley of the River Tryweryn in Gwynedd, Wales. It measures roughly long by wide, and has a maximum depth of . It has the capacity to hold of water. It was originally ...

) *** Nant Aberderfel (R) (flows into Llyn Celyn) ** Afon Llafar (L) (flows into

Bala Lake Bala Lake ( cy, Llyn Tegid ) is a large freshwater glacial lake in Gwynedd, Wales. The River Dee, which has its source on the slopes of Dduallt in the mountains of Snowdonia, feeds the long by wide lake. It was the largest natural body of ...

) ** Afon Twrch (R) ** Afon Lliw (L)

Clwyd catchment

River Clwyd The River Clwyd (Welsh: ''Afon Clwyd'') is a river in Wales that rises in the Clocaenog Forest () northwest of Corwen. Its total length is . It flows due south until, at Melin-y-wig, it veers north-eastwards, tracking the A494 and passing ...

(Afon Clwyd) ** Afon Gele (L) ** River Elwy (L) (Afon Elwy)(Also known as Afon Cledwen above the village of Llangernyw) ***

Afon Meirchion This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) *** River Aled (R) *** Afon Gallen (Ls) ** River Wheeler (R) (Afon Chwiler) **

Afon Ystrad This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

(R) ** River Clywedog (Clwyd) (L) (Afon Clywedog) (Not to be confused with the Dee tributary of the same name)

Conwy catchment

* River Conwy (Afon Conwy) ** Afon Gyffin (L) ** Afon Roe (L) (known as Afon Tafolog in upper reaches) ** Afon Dulyn (L) ***

Afon Ddu (Welsh for ''black river'') is the name of several rivers in Snowdonia in north-west Wales: * The largest of these flows from Llyn Cowlyd on the south-eastern edge of the Carneddau range to join the river Conwy, passing Pont Dolgarrog on the ...

(L) *** Afon Garreg-wen (L) *** Ffrwd Cerriguniawn (L) *** Afon Melynllyn (R) ** Afon Porth-llwyd (L) *** Afon Eigiau **

(L) ** Afon Crafnant (L) *** Afon Geirionydd (R) ** Afon Gallt y Gwg (R) ** Nant y Goron (R) ** Afon Llugwy (L) *** Nantygwryd (R) ** Afon Lledr (L) *** Afon Wybrnant (R) ***

Afon Maesgwm This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an ups ...

(R) *** Afon Ystumiau (L) ** Afon Machno (L) *** Afon Glasgwm (L) ** Afon Iwrch (R) ** Afon Eidda (L) ** Merddwr (R) ** Afon Caletwr (R) ** Afon Serw (R)

Simple coastal catchments

* Afon Gyrach *

** Afon Glan-sais (L) ** Afon Maes-y-bryn (R)

Aber catchment

* Afon Aber ** Afon Anafon (Rs) ** Afon Rhaeadr Fawr (Ls) *** Afon Rhaeadr Bach (Ls) **** Afon Gam (L) *** Afon Goch (Rs)

Ogwen catchment

* Afon Ogwen ** Afon Caseg (R) ***

Afon Llafar : ''For the river which flows into Bala Lake see Afon Llafar (Dee)'' Afon Llafar is a river in the Carneddau, Snowdonia. It rises where many streams flow down the slopes of Yr Elen, Carnedd Llewelyn and Carnedd Dafydd to join together in the ...

(L) *** Afon Denau (flows into

Llyn Ogwen Llyn Ogwen (; ) is a ribbon lake in north-west Wales. It lies alongside the A5 road A5 Road may refer to: ;Africa * A5 highway (Nigeria), a road connecting Lagos and Ibadan * A5 road (Zimbabwe), a road connecting Harare and Francistown ;Ame ...

) **** Nant Gwern y Gof (L) *** Afon Lloer (flows into

)

Cegin catchment

River Cegin A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wat ...

(Afon Cegin)

Adda catchment

* River Adda (Afon Adda)

Isle of
Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a Local government in Wales, principal area known as the Isle of Anglesey, that includes Holy Island, Anglesey, Holy Island across the narrow Cymyran Strai ...
rivers

Anticlockwise from

Menai Bridge Menai Bridge ( cy, Porthaethwy; usually referred to colloquially as Y Borth) is a town and community on the Isle of Anglesey in north-west Wales. It overlooks the Menai Strait and lies by the Menai Suspension Bridge, built in 1826 by Thomas Te ...

/ Porthaethwy

Minor coastal catchments

Afon Cadnant The Afon Cadnant ( en, River Cadnant) is a small river on Anglesey, North Wales, which drains to the Menai Strait about 1 km north-east of the Menai Suspension Bridge. The river drains a largely agricultural area from Llandegfan to Llans ...

(River Cadnant) * Nant Meigan * Lleiniog *

Afon Nodwydd This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an ups ...

* Afon y Marchogion *

Afon Lligwy This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an ups ...

* Nant Perfedd * Afon Goch (Dulas) * Nant y Beddyw *

Afon Bryn Gwyn This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an ups ...

* Afon Goch (Amlwch) *

Afon Wygyr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

* Gwter Fudr * Afon Alaw (River Alaw)

Crigyll catchment

* Afon Crigyll ** Afon Caradog (L)

Ffraw catchment

* Afon Ffraw ** Afon Frechwen (L) ** Afon Gwna (flows into

Llyn Coron The Afon Ffraw is a short river on the Isle of Anglesey, Wales. It arises at Llyn Coron and flows southwest for two miles along the northwestern margin of Twyn Aberffraw ('Aberffraw dunes') via the village of Aberffraw Aberffraw is a village a ...

)

Cefni catchment

Afon Cefni Afon Cefni is one of the major rivers on the island of Anglesey, Wales. It is long. Its source is near to the village of Capel Coch, before flowing through Bodffordd and into Llyn Cefni in the centre of the island. It continues to run south t ...

(River Cefni) ** Afon Newydd (L) ** Afon Ceint (L) ** Afon Erddreiniog (L) (flows into Cefni Reservoir)

Braint (i) catchment

The Afon Braint bifurcates near

Llanfairpwllgwyngyll Llanfairpwllgwyngyll, or Llanfair Pwllgwyngyll (), is a large village and local government community on the island of Anglesey, Wales, on the Menai Strait next to the Britannia Bridge and across the strait from Bangor. Both shortened (Llanf ...

to form two different watercourses. * Afon Braint (River Braint, Dwyran) ** Afon Rhyd y Valley (L)

Braint (ii) catchment

* Afon Braint (LlanfairPG) ** Afon Rhyd Eilian (L) ''Note "Afon Menai", known as the "

Menai Strait The Menai Strait ( cy, Afon Menai, the "river Menai") is a narrow stretch of shallow tidal water about long, which separates the island of Anglesey from the mainland of Wales. It varies in width from from Fort Belan to Abermenai Point to from ...

" in English, is not technically a river, despite its Welsh name.''.

Mainland rivers flowing into the
Menai Strait The Menai Strait ( cy, Afon Menai, the "river Menai") is a narrow stretch of shallow tidal water about long, which separates the island of Anglesey from the mainland of Wales. It varies in width from from Fort Belan to Abermenai Point to from ...
and Caernarfon Bay

''From Bangor Pier to the tip of the

Llŷn Peninsula The Llŷn Peninsula ( cy, Penrhyn Llŷn or , ) extends into the Irish Sea from North West Wales, south west of the Isle of Anglesey. It is part of the historic county of Caernarfonshire, and historic region and local authority area of Gwynedd. ...

Seiont catchment

* Afon Seiont (River Seiont) (known as Afon Rhythallt above Pont-Rhythallt) ** Afon Nant Peris (flows into Llyn Peris) *** Afon Arddu (L)

Gwyrfai catchment

Afon Gwyrfai The Afon Gwyrfai is a short river in Gwynedd, Wales. For half of its length it flows through Snowdonia National Park. Exiting Llyn y Gader it flows north through the small village of Rhyd-ddu to enter the southeastern end of Llyn Cwellyn. Downs ...

** Afon Carrog (L) *** Afon Rhŷd (R)

Simple coastal catchments

* Afon Llifon * Afon Llyfni, Lleyn * Afon Desach * Afon Hen * Nant Gwrtheyrn * Afon Geirch * Afon Amwlch * Afon Pen-y-graig

Rivers flowing into
Cardigan Bay Cardigan Bay ( cy, Bae Ceredigion) is a large inlet of the Irish Sea, indenting the west coast of Wales between Bardsey Island, Gwynedd in the north, and Strumble Head, Pembrokeshire at its southern end. It is the largest bay in Wales. Geo ...

''From the tip of the

St. David's Head ST, St, or St. may refer to: Arts and entertainment * Stanza, in poetry * Suicidal Tendencies, an American heavy metal/hardcore punk band * Star Trek, a science-fiction media franchise * Summa Theologica, a compendium of Catholic philosophy ...

'' * Afon Saint

Daron catchment

* Afon Daron ** Afon Cyllyfelin (R)

Soch catchment

Afon Soch The Afon Soch is a short river on the Llŷn peninsula, Gwynedd, Wales. It arises to the north of the village of Sarn Meyllteyrn, through which it then flows, turning southeast towards Botwnnog. Beyond Botwnnog it is joined by its main left-bank tr ...

** Afon Horon (L)

Rhyd-hir catchment etc

* Afon Rhyd-hir ** Afon Penrhos (R) *

Afon Erch The Afon Erch is a short river on the Llŷn peninsula, Gwynedd, Wales. It arises on the slopes of Bwlch Mawr, flowing south and southwest towards the hamlet of Llwyndyrys where it turns abruptly eastwards and curves around to the south, passing ...

Afon Wen Afon Wen is a small hamlet on the Llŷn peninsula in the Welsh principal area of Gwynedd. Location It is located at the mouth of the Afon Wen river, half a mile from the village of Chwilog and midway between Pwllheli and Cricieth. History ...

Dwyfor catchment

* Afon Dwyfor ** Afon Dwyfach (R) ** Afon Henwy (L)

Glaslyn catchment

Afon Glaslyn The Afon Glaslyn (English, ''River Glaslyn'') is a river in Gwynedd, north-west Wales. While not of great significance in terms of its length (about ), it is one of Gwynedd's primary rivers, and has greatly influenced the landscape in which it ...

** Afon Dylif *** Afon Croesor (L) **

Nantmor Nantmor is a hamlet which lies about 1½ miles to the south of the village of Beddgelert in Gwynedd, Wales. The current spelling of the name Nantmor is more modernmost old documentfrom the 16th to the 18th century record the name as Nanmor. It ...

(L) ** Afon Colwyn (R) ** Afon Llynedno (L) *

Afon Dwyryd The River Dwyryd ( cy, Afon Dwyryd, meaning a river of two fords) is a river in Gwynedd, Wales which flows principally westwards; draining to the sea into Tremadog Bay, south of Porthmadog. Geography The Dwyryd rises in the hills to the north of ...

(Headwaters are disputed to be the Afon Goedol) ** Afon y Glyn (L) **

Afon Prysor The River Dwyryd ( cy, Afon Dwyryd, meaning a river of two fords) is a river in Gwynedd, Wales which flows principally westwards; draining to the sea into Tremadog Bay, south of Porthmadog. Geography The Dwyryd rises in the hills to the north o ...

(L) ** Afon Cynfal (L) ** Afon Teigl (L) ** Afon Bowydd ** Afon Tafarn Helyg

Artro catchment

* Afon Artro ** Afon Cwmnantcol (L)

Ysgethin catchment

* Afon Ysgethin

Mawddach catchment

Afon Mawddach The Afon Mawddach ( en, River Mawddach, italic=yes) is a river in Gwynedd, Wales, which has its source in a wide area north of Dduallt in Snowdonia. It is 28 miles (45 km) in length, and is much branched; many of the significant tribut ...

** Afon Dwynant (R) ** Afon Gwynant (L) ** Afon Cwm-llechen (R) ** Afon Cwm-mynach (R) ** Afon Wnion (L) *** Afon Clywedog (L) *** Afon Celynog (L) **

(L) ** Afon Gamlan (R) ** Afon Eden (R) *** Afon Crawcwellt (R) ** Afon Gain (R)

Dysynni catchment

Afon Dysynni The River Dysynni ( cy, Afon Dysynni) is a river in mid Wales. Its source is the Tal-y-llyn Lake ( cy, Llyn Mwyngil) just south of the Cadair Idris massif and its mouth is in the Cardigan Bay area of the Irish Sea to the north of Tywyn. It measure ...

(R) **

Afon Fathew The Afon Fathew ( en, River Mathew/Fathew) is a river in Gwynedd, north-west Wales. The river is downstream from the Dolgoch Falls which is a popular nature site, and is followed for much of its course by the Talyllyn Railway. Name The basi ...

(L) ** Afon Cadair (R) ** Nant Gwernol (L)

Dyfi catchment

River Dyfi The River Dyfi ( cy, Afon Dyfi; ), also known as the River Dovey (; ), is an approximately long river in Wales. Its large estuary forms the boundary between the counties of Gwynedd and Ceredigion, and its lower reaches have historically been c ...

(River Dovey) **

Afon Leri The Afon Leri ( en, River Leri) is a river in Ceredigion, Wales. It rises at Llyn Craig-y-Pistyll and is joined at Talybont by Afon Ceulan before passing behind Borth to its mouth in the Dyfi Democratic Youth Federation of India (DYFI ...

(L) *** Afon Ceulan (R) ** Afon Einion (L) ** Afon Llyfnant (L) **

Afon Dulas The Afon Dulas, or North Dulas, is a river forming the border between Merionethshire/Gwynedd and Montgomeryshire/Powys in Wales. Another river called Afon Dulas joins the Dyfi from the south, upstream of its confluence with the North Dulas: loca ...

(R) (North Dulas) ***

Afon Deri The Afon Deri (sometimes known as the ''Afon Corris'') is a river in Mid Wales. It flows from the eastern flank of Mynydd Ty-Glas down to Corris, where it joins the Afon Dulas that flows south to the Afon Dyfi The River Dyfi ( cy, Afon Dyfi ...

(R) *** Nant Ceiswyn (R) **

(L) (South Dulas) **

Afon Twymyn The Afon Twymyn ( en, River Twymyn, italic=yes) is a river in Powys, Mid Wales. From its source at the 40-metre high Ffrwd Fawr waterfall and head of the Pennant Valley near Dylife the river flows through Llanbrynmair before joining the Ri ...

(L) *** Afon Rhiwsaeson (R) ****

Afon Laen This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstr ...

(L) ** Afon Angell (R) ** Afon Cleifion (L) *** Afon Dugoed (Rs) ***

Afon Tafolog The Afon Tafolog is a small river in Snowdonia in north-west Wales. It is fed by a number of streams which drain the eastern slopes of Drum, a mountain in the Carneddau range. It is a tributary of Afon Roe which then flows through the village of ...

(Ls) **

Afon Cerist The Afon Cerist is a small river that flows from underneath Craig Portas, the cliffs on the north side of Maesglase mountain, to meet the River Dyfi at Dinas Mawddwy Dinas Mawddwy () is a village in the community of Mawddwy in south-east Gwyn ...

(R) ** Afon Cywarch (R)

Clarach catchment

* Afon Clarach (formed at the confluence of

Afon Stewi This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstrea ...

and Nant Silo) ** Bowstreet Brook (R) ** Afon Peithyll (Ls)

Rheidol catchment

River Rheidol The Afon Rheidol is a river in Ceredigion, Wales, in length. The source is Plynlimon. Receiving an average annual rainfall of , Plynlimon is also the source of both the Wye and the Severn. Geography and geology The Rheidol rises in the headwa ...

(Afon Rheidol) ** Afon Melindwr (R) ** River Mynach (L) (Afon Mynach) *** Afon Merin (Rs) *** Nant Rhuddnant (Ls) ** Afon Castell (L) ** Afon Llechwedd Mawr (flows into Nant y Moch Reservoir) *** Afon Lluestgota (R) ** Afon Hengwm (flows into Nant y Moch Reservoir) *** Afon Hyddgen (R) **

Nant-y-moch Nant-y-moch Reservoir () is situated in the Cambrian Mountains in northern Ceredigion, Wales, near Pumlumon. The reservoir which flooded a part of the valley of the River Rheidol and its headwaters derives its name from a stream, the Nant-y-m ...

(stream flowing into Nant-y-moch Reservoir)

Ystwyth catchment

River Ystwyth The River Ystwyth (; cy, Afon Ystwyth "winding river") is a river in Ceredigion, Wales. The length of the main river is . Its catchment area covers . Its source is a number of streams that include the Afon Diliw, located on the west slopes of ...

(Afon Ystwyth) ** Afon Fâd (L) ** Afon Llanfihangel (R) *** Nant Cynon (Ls) ** Afon Magwr (R) ** Nant Freuo (L) ** Nant Pant-yr-Haidd (R) ** Nant Cwmtarw (L) *** Nant Cwm-nel (L) ** Nant Cilmeddu (L) ** Nant y Henfelin (L) *** Nant yr Brithyll (R) ** Nant y Berws (L) ** Nant Cell (R) ** Nant Lledwenau (R) ** Nant Bwlchgwallter (L) ** Nant Peiran (R) *** Nant Crafanglach (R) *** Nant Perfedd (L) *** Nant Ffrin-fawr (Rs) **** Nant Hylles (L) ** Nant Gau (L) *** Nant Ffrwd-ddu (L) ** Nant Cae-glas (R) *** Nant y Gwndwn-gwyn (Ls) *** Nant Cwta (Rs) ** Nant Milwyn (L) ** Nant Byr (L) ** Nant y Gwaith (R) ** Nant Watcyn (R) ** Nant yr Onnen (R) ** Nant Cwm-du (L) ** Nant Stwc (R) ** Nant Penygwndwn (L) ** Nant Garw (R) ** Nant y Cae Isaf (L) ** Nant y Cae (L) ** Nant Troedyrhiw (R) ** Afon Diliw (R) *** Nant yr Gafod (R) *** Diliw Fechan (R) *** Nant y Caseg (L) *** Nant yr Eglwys **** Nant yr Eglwys-fach (L) *** Nant Lwyd (R) *** Nant y Gorlan (Rs) *** Nant Llychese (R) ** Nant Rhydyfelin (L) ** Nant Ffos-casaf (L)

Wyre catchment

Afon Wyre Afon Wyre ( ), ( en, River Wyre), is a small river in the county of Ceredigion, Wales; also called Afon Wyre Fawr ("Great Wyre") and formerly Gwyrai. The river runs north from its source for about 1.5 miles or 2.5 km, through Lledrod, ...

** Afon Carrog (R) ** Wyre Fach (L) *** Nant Rhydrosser (L) *** Afon Tryal (L) **

Afon Beidog This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L)

Cledan catchment

* Afon Cledan

Arth catchment

River Arth The River Arth is a small river that rises in the hills near Bethania, Ceredigion, Wales, and runs west for and discharges into Cardigan Bay at Aberarth. Despite its small size it is one of the few rivers in Britain which has a bore Bore ...

Aeron catchment

Afon Aeron The River Aeron ( cy, Afon Aeron) is a small river in Ceredigion, Wales, that flows into Cardigan Bay at Aberaeron. It is also referred to on some older maps as the River Ayron. Etymology The name of the river means "battle" or "slaughter ...

** Afon Mydr (L) ** Gwenffrwd (R)

Coastal streams

* Afon Drywi * Afon Soden * Afon Fynnon Ddewi * Nant Hawen * Hoffnant

Teifi catchment

River Teifi , name_etymology = , image = File:Llyn Teifi - geograph.org.uk - 41773.jpg , image_size = , image_caption = Llyn Teifi, the source of the Teifi , map = , map_size = , map_caption ...

(Afon Teifi) **

Afon Piliau This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) ** Nant Arberth (R) **

Afon Cych Afon Cych (standard Welsh orthography: Afon Cuch) is a tributary of the River Teifi in south-west Wales. It is 13 km long, passes through a number of small settlements on the border between Pembrokeshire and Carmarthenshire, and is signifi ...

(L) ***

(L) *** Afon Pedran (L) *** Afon Sylgen (R) ** Afon Hirwaun (R) ** Nant Elfed (R) ** Afon Ceri (R) *** Afon Dulas (Lampeter) (R) *** Afon Bedw (L) ** Nant Bargod (L) ** Afon Tyweli (L) *** Afon Talog (R) ** Afon Clettwr (P) *** Clettwr Fawr (Rs) *** Clettwr Fach (Ls) ** Nant Cledlyn (R) **

Afon Duar This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) ** Afon Granell (R) ** Afon Dulas (Llandyssul) (R) *** Afon Denys (R) ** Nant Clywedog (L) *** Clywedog-isaf (Ls) *** Clywedog-ganol (Rs) **** Clywedog-uchaf (R) ** Afon Brefi (L) ** Nant Bryn-maen (R) ** Afon Berwyn (L) ***

Afon Groes This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(R) ** Afon Fflur (L) ** Camddwr (R) ** Afon Meurig (R) ** Nant Lluest (R) ** Glasffrwd (L) ** Nant Egnant (L) ** Nant Rhydol (R)

Nyfer catchment etc

* Afon Nyfer ** Nant Duad (R) ** Afon Brynberian (L) ** Afon Bannon (L)

Minor coastal catchments

River Gwaun A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

(Afon Gwaun) ** River Aer (L)

Rivers flowing to west Pembrokeshire coast

''From St David's Head to St. Govan's Head''

Minor catchments

* River Alun *

River Solva The River Solva (Welsh: ''Afon Solfach'') is a small river in Pembrokeshire, Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England borde ...

(Afon Solfach) *

Brandy Brook Brandy is a liquor produced by distilling wine. Brandy generally contains 35–60% alcohol by volume (70–120 US proof) and is typically consumed as an after-dinner digestif. Some brandies are aged in wooden casks. Others are coloured wit ...

Cleddau catchment

* Daugleddau (estuary is Daugleddyf or

Milford Haven Milford Haven ( cy, Aberdaugleddau, meaning "mouth of the two Rivers Cleddau") is both a town and a community in Pembrokeshire, Wales. It is situated on the north side of the Milford Haven Waterway, an estuary forming a natural harbour that ha ...

downstream) **

Pembroke River Pembroke River is a short waterway near Pembroke, Pembrokeshire, West Wales. Course Rising at Hogeston Hill, near Manorbier Newton, the river meanders through Lamphey and flows past Pembroke Castle to its confluence with Milford Haven Waterway ...

(L) ** Carew River (L) ** Cresswell River (L) **

Western Cleddau The River Cleddau ( cy, Afon Cleddau) consists of the Eastern and Western Cleddau rivers in Pembrokeshire, west Wales. They unite to form the Daugleddau estuary and the important harbour of Milford Haven. The name of the combined estuary – ...

(Rs) *** Millin Brook (L) *** Merlin's Brook (R) *** Cartlett Brook (L) *** Knock Brook (R) **** Camrose Brook (R) *** Rudbaxton Water (L) *** Spittal Brook (L) *** Nant-y-coy Brook (R) *** Afon Anghof (L) **** Afon Glan-rhyd (R) *** Nant y Bugail (L) *** Afon Cleddau (upper reaches of Western Cleddau) ** Eastern Cleddau (Ls) *** Afon Syfynwy (R) *** Afon Wern (R)

Rivers flowing into the
Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River S ...

''From St. Govan's Head to M48 Bridge''

Taf catchment

River Tâf The River Taf ( cy, Afon Taf) is a river in West Wales. It rises in the Preseli Hills, Pembrokeshire, and continues through Carmarthenshire to Laugharne. It is one of the three rivers to enter the sea on the east side of Carmarthen Bay. The ot ...

(Afon Taf) **

River Cywyn The River Cywyn (Welsh ''Afon Cywyn'') is a river that flows through Carmarthenshire, south Wales Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales ...

(Afon Cywyn) (L) ** Afon Cynin (L) ***

Afon Dewi Fawr This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) *** Afon Sien (R) ** Afon Fenni (R) ** Afon Gronw (L) ** Afon Marlais (R)

Towy catchment

* Afon Tywi (River Towy) ** Afon Gwili (R) ** Afon Annell (R) **

River Cothi The Afon Cothi ( en, River Cothy) is the largest tributary of the River Tywi in south Wales. It is noted for its trout and sea trout (sewin) fishing Fishing is the activity of trying to catch fish. Fish are often caught as wildlife from ...

(R) (Afon Cothi) *** Afon Gorlech (R) ***

Afon Twrch The Afon Twrch is a river which rises in the Black Mountain in south Wales. It forms the boundary between the counties of Brecknockshire (currently administered as part of the unitary authority of Powys) and Carmarthenshire and, downstream of Y ...

(R) *** Afon Marlais (R) **

(R) ** Afon Cennen (L) ** Afon Sawdde (L) **

Afon Bran This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

(L) *** Afon Ydw (R) ** Afon Dulais (R) ** Afon Brân (L) *** Cynnant Fawr (Rs) **** Cynnant Fach (L) *** Afon Lwynor (Ls) *** Afon Crychan (L) *** Afon Gwydderig (L) ** Afon Gwenlais (R) ** Gwenffrwd (R) *** Nant Melyn (R) ** Afon Doethie (R) *** Afon Pysgotwr Fawr (R) **** Afon Pysgotwr Fach (R) ** Camddwr (R)

Gwendraeth catchment

River Gwendraeth The River Gwendraeth ( cy, Afon Gwendraeth) is a river in Carmarthenshire in West Wales. It has two almost equal branches that have their confluence in their joint estuary at Carmarthen Bay. The Gwendraeth Fawr (''large Gwendraeth'' in English) ...

Gwendraeth Fach The River Gwendraeth ( cy, Afon Gwendraeth) is a river in Carmarthenshire in West Wales. It has two almost equal branches that have their confluence in their joint estuary at Carmarthen Bay. The Gwendraeth Fawr (''large Gwendraeth'' in English) ...

(Rs) **

Gwendraeth Fawr The River Gwendraeth ( cy, Afon Gwendraeth) is a river in Carmarthenshire in West Wales. It has two almost equal branches that have their confluence in their joint estuary at Carmarthen Bay. The Gwendraeth Fawr (''large Gwendraeth'' in Engl ...

(Ls)

Lliedi catchment

* River Lliedi (Afon Lliedi)

Loughor catchment

River Loughor The River Loughor () ( cy, Afon Llwchwr) is a river in Wales which marks the border between Carmarthenshire and Swansea. The river is sourced from an underground lake at the Black Mountain emerging at the surface from Llygad Llwchwr which transl ...

(Afon Llwchwr) ** Burry Pill (L) ** Afon Lliw (L) *** Afon Llan (L) ** Afon Gwili (R) **

River Amman The River Amman () is a river of south Wales, which joins the River Loughor at Pantyffynnon. The source of the Amman is on the Black Mountain. The river name is said to derived from the Welsh word ' "pig, piglet", reflecting the way in which ...

(L) ** Afon Lash (R) ** Afon Morlais (R) ** Afon Dulais **

Afon Camffrwd This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an ups ...

Clyne catchment

* Clyne River

Tawe catchment

River Tawe The River Tawe (; cy, Afon Tawe ) is a long river in South Wales. Its headwaters flow initially east from its source below Llyn y Fan Fawr south of Moel Feity in the Black Mountains, the westernmost range of the Brecon Beacons National P ...

** Nant y fendrod (L) ** Lower Clydach River (R) ** Upper Clydach River (R) *** River Egel (L) **

(R) *** Nant Gwys (L) **** Gwys Fawr (Ls) **** Gwys Fach (Rs) *** Nant Llynfell (R) *** Nant y Llyn (R) ** River Giedd (R) *** Nant Cyw (L) *** Nant Ceiliog (L) ** Nant Llech (L) *** Nant Llech Pellaf (L) ** River Haffes (R) ** Nant Byfre (L) ** Nant y Llyn (R)

Neath catchment

River Neath River Neath ( cy, Afon Nedd) is a river in south Wales running south west from the point at which its headwaters arising in the Brecon Beacons National Park converge to its mouth at Baglan Bay below Briton Ferry on the east side of Swansea Ba ...

** River Clydach (R) ** River Dulais (R) **

Melin Cwrt Brook Melin is a commune in the Haute-Saône department Department may refer to: * Departmentalization, division of a larger organization into parts with specific responsibility Government and military *Department (administrative division), a ge ...

(L) ** Clydach Brook (L) ** Nedd Fechan (Rs) ***

Afon Pyrddin The Afon Pyrddin is a river forming a short section of the boundary between the counties of Brecknockshire and Glamorgan in Wales, Great Britain. It also forms a part of the boundary of the Brecon Beacons National Park, and the boundary of the ...

(R) **

Afon Mellte Afon Mellte or the River Mellte is a river in south Wales. It is formed by the confluence of the Afon Llia and the Afon Dringarth. It then flows south through the village of Ystradfellte to Pontneddfechan where it joins with the Nedd Fechan ...

(Ls) *** Sychryd(L) ***

Afon Hepste The Afon Hepste is a river in Powys, Wales, though partly forming the county's border with Rhondda Cynon Taf. It runs wholly within the Brecon Beacons National Park. Its headwaters, the Afon y Waun, Nant y Cwrier and Nant Hepste Fechan, rise o ...

(L) ***

Afon Llia The Afon Llia is a short river in Powys, Wales, and which is wholly contained within the Brecon Beacons National Park. Several streams draining the eastern slopes of Fan Nedd and the western slopes of Fan Dringarth in the Fforest Fawr sectio ...

(Rs) *** Afon Dringarth (Ls)

Afan catchment

River Afan , name_etymology = , image = The_Afon_Afan,_Cymmer_-_geograph.org.uk_-_1001060.jpg , image_size = , image_caption = The Afan near Cymmer , map = , map_size = , map_caption ...

** Ffrwd Wyllt (L) ** Nant Cwm Wenderi ** Afon Pelenna (R) ** Nant Cregan ** Afon Corrwg (R) *** Afon Corrwg Fechan (R)

Kenfig catchment

* River Kenfig (Afon Cynffig)

Ogmore catchment

River Ogmore The River Ogmore ( cy, Afon Ogwr) is a river in South Wales that is popular with anglers. It runs generally from north to south from the Ogmore Vale and Gilfach Goch, past Bridgend and Ogmore. The River Ogmore rises at Craig Ogwr (527 m) in the ...

(Afon Ogwr) **

River Ewenny The Ewenny River ( cy, Afon Ewenni) is a river in South Wales. For most of its length, it forms the border between the Vale of Glamorgan and Bridgend. It is a major tributary of the River Ogmore, which it joins near its estuary. Course The rive ...

(L) *** Afon Alun (L) *** Afon Ewenny Fach (L) *** Nant Canna (L) *** Nant Crymlyn (R) **

River Llynfi The River Llynfi, cy, Afon Llynfi, is one of three main tributaries of the River Ogmore ( cy, Afon Ogwr). It runs for around 10 miles from its source north of Maesteg and flows generally southwards through the Llynfi Valley to the confluence w ...

(R) *** Nant y Gadlys (R) *** Nant Cwm-du (L) ** Afon Garw (R) ** Afon Ogwr Fawr (Rs) ** Afon Ogwr Fach (Ls) *** Nant Iechyd (R)

Col-huw catchment

* Afon Col-huw ** Ogney Brook (Rs) ** Hoddnant (Ls) ***

Boverton Brook Boverton ( cy, Trebefered) is a village located to the east of Llantwit Major in the Vale of Glamorgan in South Wales. History Boverton was founded during the reign of William the Conqueror in England. It is thought that he himself founded Bover ...

(Ls) *** Llanmaes Brook (Rs)

Thaw catchment

River Thaw The River Thaw ( cy, Afon Ddawan) (also Ddaw) is a river in the Vale of Glamorgan, south Wales. At 20 kilometres/12.4 miles, it is the longest river entirely in the Vale of Glamorgan. Course Its source is in the hills just south of th ...

** Kenson River (L) *** River Waycock (Ls) *** Nant Llancarfan (Rs) ** Nant y Stepsau (R)

Cadoxton catchment

Cadoxton River The Cadoxton River ( cy, Afon Tregatwg) is a short river in the Vale of Glamorgan, South Wales and with a length of about 5 miles/8 kilometres it is one of Wales's shortest rivers. Course The water course becomes known as the Cadoxton just north ...

** Sully Brook (L) ** Cold Brook, Cadoxton (R) *** Nant yr Argae (L) **

East Brook, Cadoxton East or Orient is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the fac ...

(L) ** Bullcroft Brook (Ls) ** Wrinstone Brook (Rs)

Taff catchment

(Afon Taf) **

River Ely The River Ely ( cy, Afon Elái) is in South Wales flowing generally southeast, from Tonyrefail to Cardiff. The river is about long. The Ely's numerous sources lie in the mountains to the south of Tonypandy, near the town of Tonyrefail, ...

(Afon Elái) (R) *** Afon Clun (L) (Nant Myddlyn in upper reaches) **

River Rhondda The River Rhondda ( cy, Afon Rhondda) is a river in South Wales with two major tributaries, Rhondda Fawr (meaning ''big Rhondda'') and Rhondda Fach (meaning ''little Rhondda''). Description The river has two major tributaries, the ''Rhondda F ...

(R) (Afon Rhondda) *** Rhondda Fawr (Ls) ***

Rhondda Fach Rhondda , or the Rhondda Valley ( cy, Cwm Rhondda ), is a former coalmining area in South Wales, historically in the county of Glamorgan. It takes its name from the River Rhondda, and embraces two valleys – the larger Rhondda Fawr valley (' ...

(Rs) *** River Ritec (Afon Ritec) ** Nant Clydach (R) ** River Cynon (R) (Afon Cynon) ***

Aman River Aman may refer to:Poli People First names * Aman Hambleton (born 1992), Canadian chess grandmaster * Aman Hayer (born 1979), Bhangra musician * Aman Verma (actor) (born 1971), Indian actor Surnames * Mohammed Aman (born 1994), Ethiopian mid ...

***

Afon Dar This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an ups ...

***

Afon Pennar This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an upstre ...

** Bargoed Taf (L) ** Nant Morlais **

Taf Fechan The River Taff ( cy, Afon Taf) is a river in Wales. It rises as two rivers in the Brecon Beacons; the Taf Fechan (''little Taff'') and the Taf Fawr (''great Taff'') before becoming one just north of Merthyr Tydfil. Its confluence with the Ri ...

(Ls) ** Nant Ffrwd (Rs)

Rhymney catchment

Rhymney River The Rhymney River ( cy, Afon Rhymni) is a river in the Rhymney Valley, South Wales, flowing through Cardiff into the Severn Estuary. The river formed the boundary between the historic counties of Glamorgan and Monmouthshire until in 1887 ...

(Afon Rhymni) ** Nant Bargod Rhymni (R)

Usk catchment

River Usk The River Usk (; cy, Afon Wysg) rises on the northern slopes of the Black Mountain (''y Mynydd Du''), Wales, in the westernmost part of the Brecon Beacons National Park. Initially forming the boundary between Carmarthenshire and Powys, it flo ...

(Afon Wysg) **

Ebbw River The Ebbw River (; cy, Afon Ebwy) is a river in South Wales which gives its name to the town of Ebbw Vale. The Ebbw River is joined by the Ebbw Fach River (Welsh: Afon Ebwy Fach meaning 'little Ebbw river') at Aberbeeg. The Ebbw Fach is itself fe ...

(R) (Afon Ebwy) ***

Sirhowy River The Sirhowy River (Welsh language : ''Afon Sirhywi'') is a river in Wales and a tributary of the Ebbw River. Sources The Sirhowy River has its source on the slopes of Cefn Pyllau-duon above Tredegar. After flowing through Siôn-Sieffre's Res ...

(R) *** River Ebbw Fach (L) **

Afon Llwyd The Afon Lwyd or Afon Llwyd ( en, 'grey river') is a long river in south-east Wales which flows from its source northwest of Blaenavon, through Abersychan, Pontnewynydd, Pontypool, Llanfrechfa and Cwmbran before flowing, at Caerleon, into the ...

(R) **

Sôr Brook The Sôr Brook is a right bank tributary of the River Usk running largely in Monmouthshire in south Wales, though the watercourse forms the boundary with neighbouring Torfaen in places. Its uppermost reaches were inundated by the construction ...

(R) ** Olway Brook (L) **

Berthin Brook The Berthin Brook is a minor right bank tributary of the River Usk in Monmouthshire, in south Wales. Flowing north from New Inn initially, it turns east at Little Mill to flow along a former glacial meltwater channel past the former Royal Ordna ...

(R) ** Afon Gafenni (L) (River Gavenny) *** Afon Cibi (R) ** River Clydach (R) **

Grwyne Fawr The Grwyne Fawr is a river in the Brecon Beacons National Park in south Wales. A section of it forms the administrative border between Powys and Monmouthshire and also of the historic counties of Brecon and Monmouth. The river and its major trib ...

(L) *** Grwyne Fechan (R) ** Rhiangoll (L) ** Nant Cleisfer (R) **

Afon Crawnon The Afon Crawnon is a river in the Brecon Beacons National Park in the county of Powys, Wales. The headwaters rise on the hills north of Trefil and flow northeast down a valley known as Dyffryn Crawnon for 7 km to a confluence with the Rive ...

(R) **

Caerfanell The Caerfanell is a river which rises in the central section of the Brecon Beacons National Park in Powys, Wales. It rises as Blaen Caerfanell on the plateau of Gwaun Cerrig Llwydion and drops steeply down southeastwards into the head of Glyn Col ...

(R) **

Nant Menasgin The Nant Menasgin is a short river in Powys, Wales whose headwaters rise in Cwm Oergwm, beneath Fan y Bîg, in the central Brecon Beacons, and flow northeastwards via Llanfrynach, to join the River Usk at Pencelli. The stream in Cwm Oergwm is j ...

(R) **

Afon Cynrig The Afon Cynrig is a river in Powys, Wales whose headwaters rise in the central Brecon Beacons and flow northwards to join the River Usk at Abercynrig just east of Brecon. Two rivers combine to form the Cynrig just above Cantref - these being ...

(R) ** River Honddu (L) **

Afon Tarell The Afon Tarell is a river in Powys, Wales, which rises to the west of the Brecon Beacons in Brecon Beacons National Park and flows north, then north-east, for into the River Usk. The river is followed for its entire length through Glyn Tarell ...

(R) *** Nant Cwm Llwch ** Afon Ysgir (L) ** Nant Brân (L) ** Afon Cilieni (L) **

Afon Senni The Afon Senni is a river in Powys, Wales which rises in the Fforest Fawr section of the Brecon Beacons National Park and flows northwards for to a confluence with the River Usk at Sennybridge. The river rises as Blaen Senni to the north of the ...

(R) **

Afon Crai The Afon Crai is a river in Powys, Wales rising in the Fforest Fawr section of the Brecon Beacons National Park and flowing north into the River Usk. The headwaters known as Blaen-crai flow north from Bwlch Bryn-rhudd, a col between the Crai va ...

(R) **

Afon Hydfer The Afon Hydfer is a short river in Powys in the west of the Brecon Beacons National Park, south Wales. Its headwaters rise on the northeastern slopes of the Black Mountain as the streams named Trinant, Nant y Cadno, Nant yr Erydr and Crognant, ...

(R)

Wye catchment

(Afon Gwy) **

River Trothy The River Trothy ( cy, Afon Troddi) is a river which flows through north Monmouthshire, in rural south east Wales. The river rises on Campston Hill, northeast of Abergavenny. It flows southwards until Llanvapley, where it turns east. About s ...

(R) **

River Monnow The River Monnow ( cy, Afon Mynwy) marks the England–Wales border for much of its length. After flowing through southwest Herefordshire, England, and eastern Monmouthshire, Wales, its confluence with the River Wye is approximately south of ...

(Afon Mynwy) (R) ***

River Dore The River Dore (Welsh: ''Afon Aur'' lit: 'the river of gold') is a tributary of the River Monnow in Herefordshire, England. It rises on Cusop Hill, in the foothills of the Black Mountains, close to the border between England and Wales. It f ...

(L) **** Dulas Brook (R) ****

Worm Brook Worms are many different distantly related bilateral animals that typically have a long cylindrical tube-like body, no limbs, and no eyes (though not always). Worms vary in size from microscopic to over in length for marine polychaete wo ...

(L) *** River Honddu (R) *** Olchon Brook (R) *** Escley Brook (L) **

River Lugg The River Lugg ( cy, Afon Llugwy) rises near Llangynllo in Radnorshire, Wales. It flows through the border town of Presteigne and then through Herefordshire, England, where it meets its main tributary, the River Arrow, to the south of Leomi ...

(L) (Afon Llugwy) *** River Frome (L) ***

River Kenwater The River Kenwater or simply Kenwater is a short anabranch of the River Lugg, i.e. it splits from and later re-joins that river. It separates from it about 2 kilometres north-west of Leominster Leominster ( ) is a market town in Herefordshir ...

*** River Arrow (R) ****

Cynon Brook Cynon may refer to: Cynon Valley * Cynon Valley, one of the South Wales Valleys * River Cynon, the river which gives its name to the Cynon Valley * Rhondda Cynon Taf, an administrative area in Wales created through the merger of the former district ...

***** Gilwern Brook **** Gladestry Brook ** Dulas Brook (R) ** Afon Llynfi (R) ***

River Ennig A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of ...

(R) *** Dulas (L) **** Triffrwd (L) ** Bachawy (L) ** Afon Edw (L) **

Duhonw Duhonw is a rural community in Powys, Wales, to the south of Builth Wells ( cy, Llanfair ym Muallt), in the historic county of Breconshire. Covering an area of and including scattered farms and dwellings, it is bounded to its north by the Afon I ...

(R) ** Afon Irfon (R) *** Afon Chwerfri (L) *** Dulas (L) *** Afon Cammarch (L) ***

(R) *** Afon Gwesyn (L) ** Dulas Brook (L) **

River Ithon A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

(L) (Afon Ieithon) *** Dulas (R) *** Clywedog Brook (R) *** Afon Aran (L) *** Camddwr (L) ** Afon Elan (R) *** Afon Claerwen (R) **** Rhiwnant (R) **** Afon Arban (R) **** Afon Claerddu (R) *** Afon Gwngu (R) ** Afon Marteg (L) ** Afon Bidno (L) **

Afon Tarennig This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributaries are listed down the page in an ups ...

(R)

Severn catchment

With the exception of a small part of the Rea Brook, all tributaries of the Severn downstream of the confluence of the Severn and the Vyrnwy are wholly in England. For details see

List of rivers of England This is a list of rivers of England, organised geographically and taken anti-clockwise around the English coast where the various rivers discharge into the surrounding seas, from the Solway Firth on the Scottish border to the Welsh Dee on the Wel ...

. *

River Severn , name_etymology = , image = SevernFromCastleCB.JPG , image_size = 288 , image_caption = The river seen from Shrewsbury Castle , map = RiverSevernMap.jpg , map_size = 288 , map_ ...

(Afon Hafren),

Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River S ...

(Mor Hafren) **

Rea Brook The name Rea Brook can refer to either of two brooks in Shropshire, England. One of the brooks, which eventually becomes the River Rea, is in southern Shropshire. It is to the east of Brown Clee Hill. The other, described here, is a minor ...

(R) (small parts of upper catchment in Wales) **

River Vyrnwy The River Vyrnwy ( cy, Afon Efyrnwy, ) is a river which flows through northern Powys, Wales, and Shropshire, England. The name derives from Severn, the river of which it is a tributary. Course The river used to be sourced from the many rivers a ...

(L) (Afon Efyrnwy) (lowermost section in England) *** Afon Tanat (L) (lowermost section in England) ****

Cynllaith Cynllaith or Cynllaeth was a '' cwmwd'' (commote) of north east Wales in the cantref of Swydd y Waun which was once part of the Kingdom of Powys and later part of the smaller kingdom of Powys Fadog. Cynllaith, or at least the part of it called ...

(L) (part forms the border between Wales and England) ***** Afon Ogau **** Afon Iwrch (L) ****

Afon Rhaeadr The River Rhaeadr ( cy, Afon Rhaeadr) is a river in Wales. It starts at the Pistyll Rhaeadr waterfall a few miles from the village of Llanrhaeadr-ym-Mochnant, where the Afon Disgynfa falls over a 240-foot (73 m) cliff-face, after which the riv ...

(L) **** Afon Eirth (L) *** Afon Cain (L) **** Nant Fyllon (Ls) **** Nant Alan (Rs) *** Afon Banwy (R) (a.k.a. Afon Einion) **** Afon Einion (R) **** Afon Gam (R) ****

(L) ** Maerdy Brook (L) ** New Cut/Guilsfield Brook (L) ** Luggy Brook (L) **

Camlad The River Camlad (or just Camlad) is a minor river in Powys and Shropshire. It forms part of the border between Wales and England in places, before flowing into the River Severn. It is notable for being the only river to cross from England ...

(R) (partly in England) **

River Rhiw The River Rhiw ( cy, Afon Rhiw meaning 'slope river' or 'stream river') is a short river in the north of Powys in Wales. Two headwater tributaries both named Afon Rhiw flow east to join at Dwyrhiew and then continue in a generally easterly direc ...

(Afon Rhiw) (L) *** Afon Rhiw (north fork) (Rs) *** Afon Rhiw (south fork)(Ls) ** Llifior Brook (L) ** The Mule (R) (Afon Miwl) ** Bechan Brook (L) ** Mochdre Brook (R) ** Nant Rhyd-ros lan?? **

Afon Carno The River Carno ( cy, Afon Carno) is a river in Powys, mid Wales, and a tributary of the River Severn. The river is named after the village of Carno, which is close to the source in the foothills of the Cambrian Mountains. From Carno it flows ...

(L) *** Afon Cerniog (R) *** Afon Cledan (R) **

Afon Trannon This is a list of rivers of Wales, organised geographically. It is taken anti-clockwise from the Dee Estuary to the Severn Bridge, M48 Bridge that separates the estuary of the River Wye from the River Severn. Tributary, Tributaries are listed do ...

(L) ***

(R) **** Colwyn Brook (L) ** Nant Feinion (R) ** Wigdwr Brook (L) ** Afon Clywedog (L) *** Afon Biga (R) (flows into

Clywedog Reservoir The Clywedog Reservoir ( cy, Llyn Clywedog) is a reservoir near Llanidloes, Wales on the head-waters of the River Severn. The construction of the reservoir was enabled by an Act of Parliament which asserted that ''"At certain times the flow of w ...

) ***

(R) (flows into

) **

(R) *** Afon Brochan (L) *** Nant Cydros (R) *** Rhydyclwydau Brook (R)

Longest rivers in Wales

This is a table of the longest rivers wholly or partially in Wales.Encyclopædia Britannica. 1911. "Wales" Rivers only partly in Wales are included in this table in ''italics''. Note that river lengths given by different authorities vary due to the different ways in which the measurement is made or indeed estimated. That rivers are partly

fractal In mathematics, a fractal is a geometric shape containing detailed structure at arbitrarily small scales, usually having a fractal dimension strictly exceeding the topological dimension. Many fractals appear similar at various scales, as il ...

in nature accounts for some variation and lengths can also vary slightly over time as meanders expand or are cut off where rivers run through broad flood-plains.

References

{{Authority control

Rivers of Wales

Mainland rivers flowing into Liverpool Bay

Dee catchment

Clwyd catchment

Conwy catchment

Simple coastal catchments

Aber catchment

Ogwen catchment

Cegin catchment

Adda catchment

Isle of Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a Local government in Wales, principal area known as the Isle of Anglesey, that includes Holy Island, Anglesey, Holy Island across the narrow Cymyran Strai ... rivers

Minor coastal catchments

Crigyll catchment

Ffraw catchment

Cefni catchment

Braint (i) catchment

Braint (ii) catchment

Seiont catchment

Gwyrfai catchment

Simple coastal catchments

Rivers flowing into Cardigan Bay Cardigan Bay ( cy, Bae Ceredigion) is a large inlet of the Irish Sea, indenting the west coast of Wales between Bardsey Island, Gwynedd in the north, and Strumble Head, Pembrokeshire at its southern end. It is the largest bay in Wales. Geo ...

Daron catchment

Soch catchment

Rhyd-hir catchment etc

Dwyfor catchment

Glaslyn catchment

Artro catchment

Ysgethin catchment

Mawddach catchment

Dysynni catchment

Dyfi catchment

Clarach catchment

Rheidol catchment

Ystwyth catchment

Wyre catchment

Cledan catchment

Arth catchment

Aeron catchment

Coastal streams

Teifi catchment

Nyfer catchment etc

Minor coastal catchments

Rivers flowing to west Pembrokeshire coast

Minor catchments

Cleddau catchment

Rivers flowing into the Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River S ...

Taf catchment

Towy catchment

Gwendraeth catchment

Lliedi catchment

Loughor catchment

Clyne catchment

Tawe catchment

Neath catchment

Afan catchment

Kenfig catchment

Ogmore catchment

Col-huw catchment

Thaw catchment

Cadoxton catchment

Taff catchment

Rhymney catchment

Usk catchment

Wye catchment

Severn catchment

Longest rivers in Wales

See also

References

Isle of
Anglesey Anglesey (; cy, (Ynys) Môn ) is an island off the north-west coast of Wales. It forms a Local government in Wales, principal area known as the Isle of Anglesey, that includes Holy Island, Anglesey, Holy Island across the narrow Cymyran Strai ...
rivers

Rivers flowing into
Cardigan Bay Cardigan Bay ( cy, Bae Ceredigion) is a large inlet of the Irish Sea, indenting the west coast of Wales between Bardsey Island, Gwynedd in the north, and Strumble Head, Pembrokeshire at its southern end. It is the largest bay in Wales. Geo ...

Rivers flowing into the
Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River S ...