Five people have been rescued after their boat capsized in the Manukau Harbour.
The Coastguard said the incident happened near Puketutu Island about 8.20am on Saturday.
The Police Eagle helicopter, Coastguard units from Titirangi and Papakura and Auckland Airport's hovercraft helped to get the boaties out of the sea.
Coastguard is reminding people heading to the water over the winter to be prepared by checking equipment is in good condition, wearing a lifejacket and taking two forms of waterproof communication.
Boaters should also be aware of changing weather conditions, they said.