Saint Leu, France offers 1 beach perfect for sunbathing, surfing, swimming, and more. Saint Leu, Saint Paul, France, is known for its stunning beaches and the Kelonia Marine Turtle Observatory. The best time to travel to Saint Leu, France, is from May to October, with average air temperatures around 75°F (24°C) and water temperatures near 77°F (25°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!