Soulac sur Mer, France offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Soulac sur Mer is known for its Basilica of Notre-Dame-de-la-fin-des-Terres and its beautiful sandy beaches. The best time to travel to Soulac-sur-Mer, France, is from June to September, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!