Highland Park, United States offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Highland Park, Illinois, United States, is known for the Ravinia Festival, a renowned outdoor music festival. The best time to travel to Highland Park, United States, is in late spring (May), when the average air temperature is around 70°F (21°C) and the water temperature in nearby Lake Michigan is approximately 50°F (10°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!