Merlimont, France offers 1 beach perfect for sunbathing, surfing, swimming, and more. Merlimont is known for its beautiful sandy beaches and the Parc Bagatelle amusement park. The best time to travel to Merlimont, France, is from June to September, with average air temperatures around 60-70°F (15-21°C) and water temperatures around 60-65°F (15-18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!