Westerholz, Germany offers 2 beaches perfect for sunbathing, surfing, swimming, and more. Westerholz, Schleswig Holstein, Germany, is known for its proximity to the Geltinger Birk nature reserve and the Flensburg Fjord. The best time to travel to Westerholz, Germany, is during the summer months of June to August, when the average air temperature is around 18-22°C (64-72°F) and the water temperature in the Baltic Sea 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!