Vannes, France offers 1 beach perfect for sunbathing, surfing, swimming, and more. Vannes is known for its well-preserved medieval city walls and the stunning Gulf of Morbihan. The best time to travel to Vannes, France, is from June to September, when the average air temperature is around 18-22°C (64-72°F) and the water temperature is approximately 17-20°C (63-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!