Boulder Junction, United States offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Boulder Junction is known for its extensive network of snowmobile trails and being the "Musky Capital of the World." The best time to travel to Boulder Junction is in 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!