Souda Bay (Greek: Κόλπος Σούδας) is a bay and natural harbour near the town of Souda on the northwest coast of the Greek island of Crete. The bay is about 15 km long and only two to four km wide, and a deep natural harbour. It is formed between the Akrotiri peninsula and Cape Drapano, and runs west to east. The bay is overlooked on both sides by hills, with a relatively low and narrow isthmus in the west near Chania.
Near the mouth of Souda bay, between the Akrotiri and the town of Kalives, there is a group of small islands with Venetian fortifications. The largest island is Souda Island, giving its name to the bay.
Souda Bay is now a popular tourist destination although there are no formal public beaches designed in the area, due to the presence of the Crete Naval Base, a major naval installation of the Hellenic Navy and NATO in the eastern Mediterranean. Villages such as Megala Chorafia and Kalives afford fine views of the bay, and house-building, particularly for foreigners and tourist companies, is spreading along the bay.