Cornelius, United States offers 1 beach perfect for sunbathing, surfing, swimming, and more. Cornelius is known for Lake Norman, a popular destination for boating and water sports. The best time to travel to Cornelius, 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 Norman is approximately 65°F (18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!