Sainte Marguerite du Lac Masson, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sainte Marguerite du Lac Masson is known for Esterel Resort and Lac Masson. The best time to travel to Sainte Marguerite du Lac Masson, Canada, is during the summer months of June to August, when the average air temperature is around 20-25°C (68-77°F) and the water temperature is approximately 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!