Saint-Briac-sur-Mer, is a commune in the Ille-et-Vilaine Department in Brittany in northwestern France. Inhabitants of Saint-Briac-sur-Mer ar…Saint-Briac-sur-Mer, is a commune in the Ille-et-Vilaine Department in Brittany in northwestern France. Inhabitants of Saint-Briac-sur-Mer are called briacins in French. St Briac lies on the Gulf Stream which means it enjoys a warm climate, several degrees warmer than the surrounding areas. The village has fine examples of tropical palms and plants, along the streets, making strolls very enjoyable.