North Bay, United States offers 4 beaches perfect for sunbathing, surfing, swimming, and more. North Bay, Wisconsin, United States, is known for the North Bay State Natural Area and its proximity to the scenic Door County Peninsula. The best time to travel to North Bay, 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 60-70°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!