Police said they were called to reports of four people in trouble in the water there about 1.30pm.
They were pulled from the water near the Pakiri Beach Holiday Park on Pakiri River Rd but one died at the scene.
A St John Ambulance spokesman said one of the people, a man, was flown to North Shore Hospital in a moderate condition via rescue helicopter.
He said two children were treated by ambulance staff at the scene and did not require transfer to hospital. It's unclear why the group needed rescuing.