Cul de Sac, Saint Martin offers 1 beach perfect for sunbathing, surfing, swimming, and more. Cul de Sac, Saint Martin, is known for its proximity to Pinel Island and the scenic views of Orient Bay. The best time to travel to Cul de Sac, Saint Martin, is from December to April, with average air temperatures around 77-82°F (25-28°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!