Sand Banks, Canada offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Sand Banks, Ontario, Canada, is known for Sandbanks Provincial Park, which features some of the world's largest freshwater sand dunes and beautiful beaches. The best time to visit Sand Banks, Canada, is during the summer months of June to August, when the average air temperature is around 25°C (77°F) and the water temperature is approximately 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!