Beach Haven, United States offers 15 beaches perfect for sunbathing, surfing, swimming, and more. Beach Haven is known for its Fantasy Island Amusement Park and the Long Beach Island Historical Museum. The best time to travel to Beach Haven, United States, is from June to August, with average air temperatures around 75-85°F and water temperatures ranging from 70-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!