Mountauk, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Montauk, New York, United States, is known for Montauk Point Lighthouse and The Hamptons. The best time to travel to Montauk, United States, is from June to September, with average air temperatures ranging from 70-80°F and water temperatures around 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!