Police say the deceased went on a regular long-line fishing trip with another man from Ha’atafu around 6am on Saturday.
Kaniva News reports three hours later, when they were on their way back to the land, a huge wave hit the boat.
Police says the deceased jumped into the water and he was swept away by waves.
His body was later brought to shore by the waves.
Nukunuku Police were called in to the scene and transported the deceased’s body to Vaiola Hospital.
According to a report from the doctor, the 46-year old man died from drowning.