Lambton, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Lambton, Quebec, Canada, is known for the Frontenac National Park. The best time to travel to Lambton, 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 in nearby lakes 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!