Fossambault sur le Lac, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Fossambault sur le Lac is known for its beautiful lakefront beaches and outdoor recreational activities. The best time to travel to Fossambault-sur-le-Lac, 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 20°C (68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!