Marlborough, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Marlborough, New Hampshire, United States, is known for the historic Frost Free Library and its proximity to Mount Monadnock. The best time to travel to Marlborough, 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 55-65°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!
