Sanbornton, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sanbornton, New Hampshire, United States, is known for the historic Lane Tavern and its proximity to Lake Winnisquam. The best time to travel to Sanbornton, United States, is in late spring or early fall when the average air temperature is around 60-70°F, and the nearby lake water temperature is approximately 60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!