Fehmarn, Germany offers 17 beaches perfect for sunbathing, surfing, swimming, and more. Fehmarn is known for its Fehmarn Sound Bridge and the Fehmarnbelt Tunnel project. The best time to travel to Fehmarn, Germany, is from June to August, when the average air temperature is around 20°C (68°F) and the water temperature is approximately 18°C (64°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!