Cloonamanagh, Poland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Cloonamanagh, Warmian Masurian Voivodeship, Poland, is known for its proximity to the Masurian Lake District and the historic Teutonic Castle in Ryn. The best time to travel to Cloonamanagh, Poland, is in late spring (May to June) when the average air temperature is around 15-20°C (59-68°F) and water temperature is approximately 10-15°C (50-59°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!