Bernieres sur Mer, France offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Bernieres sur Mer is known for Juno Beach, a significant site in the D-Day landings during World War II. The best time to travel to Bernieres-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!