The South Euboean Gulf ( el, Νότιος Ευβοϊκός Κόλπος, ''Notios Evvoïkos Kolpos'') is a gulf in Central Greece, between the island of

Euboea Evia (, ; el, Εύβοια ; grc, Εὔβοια ) or Euboia (, ) is the second-largest Greek island in area and population, after Crete. It is separated from Boeotia in mainland Greece by the narrow Euripus Strait (only at its narrowest poin ...

and the Greek mainland (

Boeotia Boeotia ( ), sometimes Latinized as Boiotia or Beotia ( el, Βοιωτία; modern: ; ancient: ), formerly known as Cadmeis, is one of the regional units of Greece. It is part of the region of Central Greece. Its capital is Livadeia, and its ...

and

Attica Attica ( el, Αττική, Ancient Greek ''Attikḗ'' or , or ), or the Attic Peninsula, is a historical region that encompasses the city of Athens, the capital of Greece and its countryside. It is a peninsula projecting into the Aegean S ...

). With a total length of approximately 50 km and a width of 10 to 20 km, it stretches nearly diagonally from northwest to southeast, from the

Euripus Strait The Euripus Strait ( el, Εύριπος ) is a narrow channel of water separating the Greek island of Euboea in the Aegean Sea from Boeotia in mainland Greece. The strait's principal port is Chalcis on Euboea, located at the strait's narrowest poi ...

, which connects it to the North Euboean Gulf, to the

Petalies Gulf The Petalioi Gulf ( el, Κόλπος Πεταλιών - ''Kolpos Petalion'') is a gulf of the Aegean Sea, Greece. It stretches between the east coast of Attica and the south tip of the island Euboea. It takes its name from the Petalioi islands, th ...

near Agia Marina in the south.

Islands

* Petalioi (largest islands: Megalonisos, Chersonisi), Kavaliani, Stouronisi

Bays by the gulf

* Agion Apolstolon Bay, south * Oropos Bay, southwest * Aliveri Bay, north * Boufalo Bay, northeast * Almyropotamos Bay, northeast

Places by the gulf

* Sessi Beach, south * Varnavas Beach, south * Kalamos Beach, southwest *

Nea Palatia Nea Palatia (Greek: Νέα Παλάτια literally "New Palaces") is a community in East Attica, Greece. Since the 2011 local government reform it is part of the municipality Oropos, of which it is a community. It is part of Athens metropolitan a ...

, southwest * Skala Oropou, southwest * Chalkoutsi, southwest * Pigadaki, southwest * Dilessi, west * Paralia Achlidas, west *

Faros Faros is a village at the southeast end of the island of Ikaria, Greece. It is located on a small plain home to many vineyards. Its beach is long (said to be the longest on the island). Many consider Faros to be a tourist destination. Faros has t ...

, west * Chalkida, northwest *

Eretria Eretria (; el, Ερέτρια, , grc, Ἐρέτρια, , literally 'city of the rowers') is a town in Euboea, Greece, facing the coast of Attica across the narrow South Euboean Gulf. It was an important Greek polis in the 6th and 5th centur ...

, northwest * Amarynthos, north *

Aliveri Aliveri ( el, Αλιβέρι) is a town and a community in the island of Evvoia, Greece. It is part of the municipal unit Tamyneoi, and the seat of the municipality Kymi-Aliveri. Aliveri is situated in the western part of the island, on the S ...

, north * Panagia, northeast {{coord, 38, 20, N, 23, 50, E, scale:1000000_source:GNS, display=title Landforms of Attica Euboea Gulfs of Greece Gulfs of the Aegean Sea Landforms of East Attica Landforms of Central Greece Landforms of Euboea (regional unit)