Michigan City, United States offers 14 beaches perfect for sunbathing, surfing, swimming, and more. Michigan City is known for its beautiful beaches along Lake Michigan and the Indiana Dunes National Park. The best time to travel to Michigan City, 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 in Lake Michigan 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!