Sandy Creek, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Sandy Creek, New York, United States, is known for the Sandy Island Beach State Park and its proximity to the eastern shore of Lake Ontario. The best time to travel to Sandy Creek, United States, is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!