La Barre de Monts, France offers 2 beaches perfect for sunbathing, surfing, swimming, and more. La Barre de Monts is known for the Fromentine Beach and its proximity to the Ile de Noirmoutier. The best time to travel to La Barre de Monts, 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!