A preventative approach by Foxton Beach lifeguards may well have saved the lives of several swimmers headed for trouble on Tuesday afternoon.
The group got into difficulty when they drifted outside the flags and were caught out of their depth in a deep trench between sand bars.
Surf lifesaver Teina Kiriona spotted four people who appeared to be trying to get to shore but were "not getting anywhere."
"They were quite far out and between the breakers, you could only catch a quick glimpse of them before they disappeared again," he said.
Kiriona said one of the swimmers, a woman, looked particularly tired.