Arromanches les Bains, France offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Arromanches les Bains is known for the D-Day landing beaches and the Mulberry Harbour. The best time to travel to Arromanches-les-Bains, France, is from June to September, when the average air temperature is around 60-70°F (15-21°C) and the water temperature is approximately 60-65°F (16-18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!