The 69-year-old was found unresponsive around 11.40am, and attempts to revive him were unsuccessful.
His death has been referred to the coroner.
The incident came after police urged people to be safe around water after number of water-related deaths in recent days.
In Upper Hutt, a swimmer died after failing to resurface at Hutt River, Kaitoke Regional Park, early on Tuesday morning.
Further north in Ōpōtiki, Bay of Plenty, a man died following a water incident about 7pm Monday at Cape Runaway. Later that night in Pukekohe, Auckland, a person died after a water incident.
RNZ
