Champaign, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Champaign, Illinois, United States, is known for the University of Illinois at Urbana-Champaign. The best time to travel to Champaign, United States, is in late spring (May), when the average air temperature is around 65°F (18°C) and water temperatures in nearby lakes are typically around 60°F (16°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!