Les Trois Ilets, France offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Les Trois Ilets, Les Trois Ilets is known for La Pagerie, the birthplace of Empress Josephine, and the Sugar Cane Museum. The best time to travel to Les Trois Ilets, France, is from December to April, with average air temperatures around 77-86°F (25-30°C) and water temperatures about 79-82°F (26-28°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!