The best time to visit Boswell, British Columbia, is during the summer months, from June to September, when the weather is warm and sunny, superb for outdoor activities.During this period, the days are long, and the temperatures are ideal for exploring Kootenay Lake, whether you're interested in boating, fishing, or simply relaxing by the water. The surrounding mountains are also fully accessible for hiking and wildlife viewing.For those who enjoy water sports and fishing, July and August offer the warmest lake temperatures and the best conditions for angling. The lake is generally calm, making it pleasant for kayaking, paddleboarding, and swimming.If you prefer a quieter experience with cooler temperatures and fewer crowds, early June or September are excellent choices.