Cowansville, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Cowansville is known for its proximity to beautiful lakes and outdoor recreational activities. The best time to travel to Cowansville, Canada, is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and water temperature is approximately 68°F (20°C). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!