Amherst, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Amherst, New Hampshire, United States, is known for the historic Amherst Village Green and the Joshua's Park and Playground. The best time to travel to Amherst, United States, is in late spring (May to June) when the average air temperature is around 60-70°F, and water temperatures in nearby lakes are typically around 50-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!