Senior Constable Mike Gorrie, of Russell police, said weather conditions were ''terrible'' around the time he was thought to have fallen from his dinghy.
The incident was a reminder to people using small boats to wear a lifejacket even if they were only going a short distance, in this case thought to be less than 100m.
The Kororāreka Marae Komiti declared a rāhui over Pomare Bay, which includes Matauwhi, Uruti and Orongo bays.
Komiti members ask people to not gather shellfish or catch fish in the area until after September 12.
It's not the first such incident at Matauwhi Bay.
In 2010 48-year-old Ronald Raison, who also lived on board his vessel, disappeared while rowing out to his yacht Azarmyth in wild weather. His body was found two weeks later in Te Puna Inlet, on the other side of the Bay of Islands.
A coroner later ruled that he had drowned after falling from his dinghy.