Sainte Marie la Mer, France offers 7 beaches perfect for sunbathing, surfing, swimming, and more. Sainte Marie la Mer is known for its beautiful Mediterranean beaches and proximity to the Pyrenees. The best time to travel to Sainte Marie la Mer, France, is from June to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 72°F (22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!