Dalton, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Dalton, New Hampshire, United States, is known for its proximity to the White Mountain National Forest and the scenic views of the Connecticut River. The best time to travel to Dalton, United States, is in late spring (May), when the average air temperature is around 70°F (21°C) and the water temperature in nearby lakes is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!