Irkutsk, Russia offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Irkutsk is known for its proximity to Lake Baikal, the world's deepest and oldest freshwater lake. The best time to travel to Irkutsk, Russia, is from June to August, when the average air temperature is around 18-25°C (64-77°F) and the water temperature in nearby Lake Baikal is approximately 10-15°C (50-59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!