Henderson, United States offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Henderson, New York, United States, is known for its proximity to the scenic Lake Ontario and the historic Sackets Harbor. The best time to travel to Henderson, United States, is in the spring (March to May) when the average air temperature is around 70-80°F, and the average water temperature in nearby Lake Mead is approximately 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!