Island Park, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Island Park, New York, United States, is known for its proximity to Long Beach and the vibrant waterfront dining at Peter's Clam Bar. The best time to travel to Island Park, United States, is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and the water temperature in nearby lakes is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!