Brienzersee, Switzerland offers 1 beach perfect for sunbathing, surfing, swimming, and more. Brienzersee is known for Lake Brienz, Giessbach Falls, and the Brienz Rothorn Railway. The best time to visit Brienzersee, Switzerland, 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 18-20°C (64-68°F). Sandee provides detailed maps, photos, and reviews from fellow beachgoers to help you Choose Your Beach™ and plan your perfect beach vacation!