Munising, United States offers 10 beaches perfect for sunbathing, surfing, swimming, and more. Munising is known for Pictured Rocks National Lakeshore. The best time to travel to Munising, United States, is in July when the average air temperature is around 70°F (21°C) and the water temperature is approximately 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!