Nyhellervatnet is a lake on the border of the municipalities of Hol (in Buskerud county) and Aurland (in Vestland county), Norway. The 16.74 km2 lake sits at an elevation of 1438 m above sea level. The lake is located about 30 km southeast of the village of Aurlandsvangen (in Vestland), at the end of the Aurlandsdalen valley. In neighboring Buskerud county, the lake Djupsvatnet lies 10 km to the east and Hallingskarvet National Park lies 10 km to the south.