Plympton Wyoming, Canada offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Plympton Wyoming, Ontario, Canada, is known for the Lambton County Heritage Museum and the nearby Pinery Provincial Park. The best time to travel to Plympton-Wyoming, 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 Lake Huron 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!