Goulais Mission, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Goulais Mission, Ontario, Canada, is known for its proximity to Lake Superior Provincial Park and the Algoma Central Railway's scenic tours. The best time to travel to Goulais Mission, Canada, is during the summer months of June to August, when the average air temperature is around 20°C (68°F) and the water temperature in nearby lakes 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!