Lake Superior, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Lake Superior, Ontario, Canada, is known for the Sleeping Giant Provincial Park. The best time to travel to Lake Superior, Canada, is from June to September, with average air temperatures ranging from 60-75°F (15-24°C) and water temperatures around 50-65°F (10-18°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!