The best time to visit Biržai is during the late spring and summer months, from May to September, when the weather is at its most pleasant.
During these months, you can expect warmer temperatures and longer daylight hours, which are ideal for exploring the natural beauty of the Biržai Regional Park and its many outdoor activities. This period is also when most local attractions and tourist services operate at their fullest capacity, offering a complete experience of the area.
Families will particularly enjoy visiting in July and August. The warm weather is superb for boating on Lake Širvėna, exploring the Kirkilai Karst Lakes observation tower, or cycling along the scenic trails. Many local events and festivals also take place during the summer, providing entertainment for all ages.
For couples looking for a more peaceful experience, late May, early June, or September offer a quieter visit with fewer crowds. The weather is still very agreeable for exploring Biržai Castle, walking through the town, or enjoying a leisurely meal at a local restaurant.