There are many nice swimming spots in Hemsedal. Small mountain lakes are rapidly heated on a warm summerday (easily up to 20 C). The water in rivers and streams is a bit colder, especially in early summer when the snow is melting.
Following spots are recommended:Grøndøla, river in Grøndalen near the golf courseHemsila river, flowing through Hemsedal centre, behind Rampa shopping centreRjukandefossen, is a beautiful spot for swimming, you find it 100 meters down the river, south of the suspension bridge. Swimming close to the waterfalls is forbidden due to very strong currents.Grytevatnet, is a calm water in the forest on the way to LykkjaNøsen, by the Panorama road (ca 25 min drive form Hemsedal)