Sault Saint Marie, Canada offers 13 beaches perfect for sunbathing, surfing, swimming, and more. Sault Saint Marie, Ontario, Canada, is known for the Agawa Canyon Tour Train and the Canadian Bushplane Heritage Centre. The best time to travel to Sault Ste. Marie, Canada, is from June to August, when the average air temperature is around 68°F (20°C) and the water temperature in Lake Superior is approximately 55°F (13°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!