The best time to visit Kosewo is during the summer months, from June to August, when the weather is warm and sunny, superb for enjoying the Mazurian Lake District.During these months, the average daily temperatures are between 20°C and 25°C, making it ideal for outdoor activities such like swimming, sailing, and kayaking on Lake Probarskie. The long daylight hours also mean you have more time to explore the surrounding forests and nature trails. This period is particularly good for families looking for an active holiday with plenty of opportunities for water sports and outdoor adventures.For those who prefer a quieter experience with pleasant weather for hiking and sightseeing, late spring (May) and early autumn (September) are also excellent choices. The temperatures are milder, and the natural scenery is beautiful with blooming flowers or changing autumn leaves.