Saint-Avé (French pronunciation: [sɛ̃.t‿ave]; Breton: Sant-Teve) is a commune in the Morbihan department of Brittany in north-western France.

Located just north of the bigger city of Vannes, it is part of the Gulf of Morbihan regional natural reserve.

This type of climate is characterised by mild temperatures and relatively abundant rainfall (in conjunction with disturbances from the Atlantic), distributed throughout the year with a slight maximum from October to February.

[6] The municipality launched a linguistic plan through Ya d'ar brezhoneg on 25 March 2005.

In 2008, there was 15.35% of the children attended the bilingual schools in primary education.