Sandnesvatnet (Norwegian) or Sáttonjárgjávrre (Lule Sami) is a lake in Hamarøy Municipality in Nordland county, Norway. The European route E6 highway runs along the eastern and northern shores of the lake. The lake lies about 5 kilometres (3.1 mi) southeast of the village of Tømmerneset. The lake Strindvatnet lies just to the northwest and the lake Fjerdvatnet lies to the south of the lake.