A young American woman was rescued by the Coast Guard after becoming "mildly hypothermic" during a kayaking trip to Rangitoto on Saturday.
The woman, 19, was on a guided tour with a group of fellow university students and teachers when a tour guide noticed she had become delirious 6 kilometres out from shore and called for help, said Fergs Kayaks head instructor John Williams.
"She was slightly delirious and one of the guides observed that, then she seemed to perk up," he said.
"Then she went into more of a delirium, so the guys quite rightly called in the Coast Guard who came and picked her up."
The Coast Guard took the young woman back to the mainland where a Westpac Rescue Helicopter paramedic assessed her condition.