Cavalaire sur Mer, France offers 9 beaches perfect for sunbathing, surfing, swimming, and more. Cavalaire sur Mer is known for its beautiful beaches and the Port de Cavalaire. The best time to travel to Cavalaire-sur-Mer, France, is from June to September, with average air temperatures around 75°F (24°C) and water temperatures around 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!