Unless the signs say otherwise, bathing is permitted at all locations on Lake Thun and Lake Brienz. Discover tranquil hidden bays, picturesque bathing spots and cosy coves right by the water. What could be better than relaxing by the lake or in an open-air pool, soaking up the sun on a hot summer's day?

Yes, you can swim in Lake Brienz (Brienzersee) in Switzerland, though you should be prepared for its refreshing, glacial temperatures. Fed by melted mountain snow, the water is exceptionally clean and has a stunning turquoise hue due to fine glacial particles. In the height of a 2026 summer, surface temperatures typically reach around 17°C to 20°C (63°F–68°F), making it much cooler than neighboring Lake Thun. The best spot for swimming is the Bönigen Lido, which offers changing cabins, grassy sunbathing areas, and safe entry points. For those who find the lake a bit too brisk, many lakeside facilities provide heated pools alongside the natural swimming areas. It is a world-class experience to swim in such crystal-clear water with the backdrop of the Bernese Oberland peaks, though "plunging" rather than "lingering" is the preferred style for most swimmers.