Vatnvatnet (lit. 'the water water') is a lake that lies in Bodø Municipality in Nordland county, Norway. The 4.71-square-kilometre (1.82 sq mi) lake lies about 2 kilometres (1.2 mi) north of the village of Løding and just south of the Sjunkhatten National Park. The lake Heggmovatnet flows out into this lake.