Saint Cyr sur Mer, France offers 19 beaches perfect for sunbathing, surfing, swimming, and more. Saint Cyr sur Mer is known for its beautiful beaches like Les Lecques and the Aqualand water park. The best time to travel to Saint Cyr sur Mer, France, is from June to September, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 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!