The best time to visit Bosteri is during the summer months, particularly from June to August, when the weather is ideal for enjoying Lake Issyk-Kul.During this period, temperatures are pleasantly warm, ranging from 20°C to 28°C (68°F to 82°F), making it superb for swimming, sunbathing, and engaging in water sports on the lake. The water temperature is comfortable for swimming, typically around 20°C to 24°C (68°F to 75°F). This is also when all tourist facilities are fully operational, including boat tours, lakeside cafes, and markets.For those interested in hiking and exploring the surrounding Tien Shan mountains, late spring (May) and early autumn (September) also offer good conditions. The weather is cooler but still pleasant, with fewer crowds, making it suitable for outdoor activities without the peak summer heat.