Searchers remain "optimistic'' they will find missing Gisborne man Jesse Tamatea, who remains somewhere in the sea off Pouawa Beach, north of the city.
But police search and rescue also say the search cannot continue indefinitely.
The 25-year-old disappeared beneath the surface late on Monday afternoon when he and his partner got into difficulties on their kayaks about 600 metres off the beach.
Mr Tamatea came off his craft and lost contact with it in the strong wind.
His partner was rescued by another Pouawa camper in a small boat.