Saint Aubin sur Mer, France offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Saint Aubin sur Mer is known for its historic D-Day landing beaches and the Juno Beach Centre. The best time to travel to Saint Aubin sur Mer, France, is from June to September, when the average air temperature is around 18-22°C (64-72°F) and the water temperature is approximately 17-20°C (63-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!