Garden River, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Garden River, Ontario, Canada, is known for the Garden River First Nation and its cultural heritage. The best time to travel to Garden River, Canada, is during the summer months of June to August, when the average air temperature is around 20°C (68°F) and water temperature is approximately 15°C (59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!