Two teens were airlifted to hospital after separate incidents three minutes apart yesterday at Auckland's Piha and Muriwai beaches

Northern Region Surf Lifesaving have released their figures after a busy day on our coastlines.

At the peak there were 11 thousand people at the region's 22 patrolled beaches.

Surf Lifesaving Northern Region operations manager Alan Gibson says they rescued eight people.

He says they also carried out 800 preventative actions across the day - which involved more than four thousand beach-goers.