Kappeln, Germany offers 5 beaches perfect for sunbathing, surfing, swimming, and more. Kappeln is known for the Schlei River, the Angelner Dampfeisenbahn steam railway, and the historic herring fence. The best time to travel to Kappeln, Germany, is from June to August, when the average air temperature is around 18-22°C (64-72°F) and the water temperature is approximately 17-20°C (63-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!