Calvi, France offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Calvi is known for the Citadel of Calvi and its stunning views of the Mediterranean Sea. The best time to travel to Calvi, France, is from June to September, when the average air temperature is around 75°F (24°C) and the sea temperature is approximately 73°F (23°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!