Havvatnet is a lake in Måsøy Municipality in Finnmark county, Norway. The 3.69 square kilometres (1.42 sq mi) lake lies isolated in the mountains on the Porsanger Peninsula about 9 kilometres (5.6 mi) northeast of the village of Kokelv in Kvalsund Municipality. The lake sits at an elevation of 293-metre (961 ft) above sea level.