Biscarrosse, France offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Biscarrosse is known for its beautiful beaches, the Great Dune of Pilat, and the Biscarrosse-Parentis Lake. The best time to travel to Biscarrosse, France, is from June to September, when the average air temperature is around 70-80°F (21-27°C) and the water temperature is approximately 68-72°F (20-22°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!