Amityville, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Amityville, New York, United States, is known for the Amityville Horror House, a site of alleged paranormal activity that inspired books and films. The best time to travel to Amityville, United States, is during late spring to early summer (May to June) when the average air temperature is around 65-75°F and the water temperature is approximately 60-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!