The best time to visit Goniadz is during the summer months, from June to August, when the weather is warm and conducive to outdoor activities, and the surrounding Biebrza National Park is at its most accessible.During this period, the average daily temperatures range from 68°F to 77°F (20°C to 25°C), making it ideal for exploring the park's trails, kayaking on the Biebrza River, and wildlife watching. These months also offer the longest daylight hours, allowing for extended exploration.For travelers interested in birdwatching, the late spring, specifically May, is also an excellent time. Many migratory bird species return to the wetlands for nesting, offering prime viewing opportunities before the peak summer crowds. However, be prepared for potentially cooler temperatures and more unpredictable weather during this time.