Groswaabs, Germany offers 1 beach perfect for sunbathing, surfing, swimming, and more. Groswaabs, Schleswig Holstein, Germany, is known for its proximity to the Baltic Sea and the scenic landscapes of the Schleswig-Holstein region. The best time to travel to Groswaabs, Germany, 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 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!