Three Lakes, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Three Lakes, Wisconsin, United States, is known for the Three Lakes Chain of Lakes, the largest inland chain of lakes in the world. The best time to travel to Three Lakes, 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 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!