Central Frontenac, Canada offers 1 beach perfect for sunbathing, surfing, swimming, and more. Central Frontenac, Ontario, Canada, is known for Frontenac Provincial Park and the K&P Trail. The best time to travel to Central Frontenac, Canada, is during the summer months of June to August, when the average air temperature is around 20-25°C (68-77°F) and water temperature in lakes 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!