Noirmoutier en l Ile, France offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Noirmoutier en l Ile is known for its Passage du Gois, a unique tidal causeway that connects the island to the mainland. The best time to travel to Noirmoutier en l'Ile, France, is from June to September, with average air temperatures around 20-25°C (68-77°F) and water temperatures around 18-21°C (64-70°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!