Les Sables d Olonne, France offers 6 beaches perfect for sunbathing, surfing, swimming, and more. Les Sables d Olonne is known for the Vendée Globe, a prestigious solo non-stop round-the-world yacht race. The best time to visit Les Sables d'Olonne, 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!