Copenhagen Beach, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Copenhagen Beach, Michigan, United States, is known for its proximity to Lake Michigan and the nearby Silver Lake Sand Dunes. The best time to visit Copenhagen Beach, United States, is during the summer months of June to August, when the average air temperature is around 75°F (24°C) and the water temperature is approximately 70°F (21°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!