Ohningen, Switzerland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Ohningen, Baden Wurttemberg, Switzerland, is known for its proximity to Lake Constance and the UNESCO World Heritage Site of the Prehistoric Pile Dwellings around the Alps. The best time to travel to Ohningen, Switzerland, is from June to August, when the average air temperature is around 20-25°C (68-77°F) and the water temperature in Lake Constance is approximately 20-22°C (68-72°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!