Oka, Canada offers 3 beaches perfect for sunbathing, surfing, swimming, and more. Oka is known for Oka National Park and Oka Cheese. The best time to travel to Oka, Canada, is during the summer months of June to August, when the average air temperature is around 20-25°C (68-77°F) and the water temperature in Lake of Two Mountains 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!