Todd Vercoe slogged for three hours through rough seas, thunderstorms, lightning and the threat of sharks.
When he finally reached land he etched "SOS" in the sand with his foot in the hope rescuers would see his plea for help.
It might sound like a scene from a castaway movie but the life-threatening experience was real for the keen sailor, who thought he might not survive the exhausting swim off Northland's coast on Saturday. Still shivering, wrapped in blankets and sipping a hot coffee at Whangarei's St John Ambulance base an hour after being rescued, Mr Vercoe, 36, a house painter from Langs Beach, recounted his ordeal.
He was one of three aboard a nine-metre steel-hulled sloop that left the Bay of Islands about 8.30am on Saturday, destined first for Tutukaka, then Whangarei.
"We had the boat on autopilot and were motor sailing to keep the speed up to make it into Tutukaka before it got dark," Mr Vercoe said.