New Durham, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. New Durham, New Hampshire, United States, is known for Merrymeeting Lake and the Powder Mill Fish Hatchery. The best time to travel to New Durham, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F (21-27°C) and the water temperature in nearby lakes is approximately 65-75°F (18-24°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!