Sierakow, Poland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Sierakow is known for the Sierakow Landscape Park and the historic Sierakow Castle. The best time to travel to Sierakow, Poland, is during the summer months of June to August, when the average air temperature is around 20-25°C (68-77°F) and the water temperature in nearby lakes is approximately 18-22°C (64-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!