Manhasset, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Manhasset, New York, United States, is known for the upscale shopping destination Americana Manhasset. The best time to visit Manhasset, United States, is during late spring to early fall (May to September) when the average air temperature ranges from 60°F to 80°F, and water temperatures in nearby Long Island Sound range from 60°F to 75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!