The best time to visit Bileća is during the late spring (May to June) and early autumn (September to October) when the weather is pleasant and comfortable for exploring.
During these months, you'll experience mild temperatures, typically ranging from 60°F to 75°F (15°C to 24°C), making it ideal for outdoor activities like hiking around Bileća Lake or visiting the historic monuments in the town center. The crowds are also generally smaller than in the peak summer months, allowing for a more relaxed experience.
Summer, from July to August, brings warmer temperatures, often exceeding 85°F (30°C). While this is superb for swimming and water activities on Bileća Lake, it can be quite hot for extensive sightseeing. If you enjoy sunbathing and water sports, this is a good time to visit, but be prepared for higher temperatures and more visitors.
Winter, from November to April, sees cooler temperatures and a higher chance of rain or snow. While the area can be quite picturesque with a dusting of snow, many outdoor activities may be less accessible, and some local businesses might operate on reduced hours.