Schreiber, Canada offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Schreiber, Ontario, Canada, is known for the Casque Isles Hiking Trail and its proximity to Lake Superior. The best time to travel to Schreiber, Canada, is during the summer months of June to August, when the average air temperature is around 18-22°C (64-72°F) and the water temperature in nearby Lake Superior is approximately 10-15°C (50-59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!