Chilmark, United States offers 8 beaches perfect for sunbathing, surfing, swimming, and more. Chilmark, Massachusetts, United States, is known for its beautiful beaches like Lucy Vincent Beach and its association with the film "Jaws." The best time to travel to Chilmark, United States, is from June to September, with average air temperatures ranging from 65°F to 80°F and water temperatures around 68°F to 72°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!