Northwood, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. Northwood, New Hampshire, United States, is known for the Northwood Meadows State Park and its location along the Antique Alley, a popular route for antique shopping. The best time to travel to Northwood, United States, is during the summer months of June to August, when the average air temperature is around 70-80°F and the water temperature is approximately 65-75°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!