Lac Brome, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Lac Brome is known for Brome Lake, Knowlton village, and the Brome Lake Duck Festival. The best time to travel to Lac Brome, Canada, is during the summer months of June to August, when the average air temperature is around 70°F (21°C) and the 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!