Two men and two children spent a night stranded on rocks after their boat sank off the coast of Waikato.
Police say the boat went down close to Manu Bay, south of Raglan, at about 8pm on Friday.
After waiting on the rocks overnight, the group was able to signal a passing vessel.
One of the party swam out to the boat and was taken ashore to raise the alarm.
The others were rescued by surf club boats and Raglan Harbour Rescue.
A skipper with Raglan Volunteer Coastguard, Kevin Dreaver, says the four people were wearing lifejackets and were sheltering on a cliff face at Te Toto Gorge.
He says they were in good health and had no signs of hypothermia.
Mr Dreaver says the police are now investigating why the boat sank.