Saint Jean Cap Ferrat, France offers 18 beaches perfect for sunbathing, surfing, swimming, and more. Saint Jean Cap Ferrat is known for its stunning Mediterranean beaches and luxurious villas. The best time to travel to Saint Jean Cap Ferrat, France, is from May to September, with average air temperatures ranging from 20°C to 27°C (68°F to 81°F) and water temperatures from 18°C to 24°C (64°F to 75°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!