Carcans, France offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Carcans is known for the Hourtin-Carcans Lake and the nearby Atlantic beaches. The best time to travel to Carcans, France, is from June to September, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!