Røyrvatnet (Lule Sami:Rávddojávrre) is a lake that lies in the municipality of Sørfold in Nordland county, Norway. It is located about 4 kilometres (2.5mi) south of the village of Straumen. The water flows north out of Røyrvatnet into the lake Straumvatnet, about 750 metres (2,460ft) to the north.