South Riverdale, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. South Riverdale, Ontario, Canada, is known for its vibrant arts scene and historic architecture. The best time to travel to South Riverdale, Canada, is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and the water temperature is approximately 68°F (20°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!