South Milwaukee, United States offers 2 beaches perfect for sunbathing, surfing, swimming, and more. South Milwaukee, Wisconsin, United States, is known for Grant Park, which features the scenic Seven Bridges Trail and a historic beach house. The best time to travel to South Milwaukee is in late spring (May to June) when the average air temperature is around 60-70°F and Lake Michigan's water temperature is approximately 50-60°F. Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!