A teenage boy was airlifted to hospital after falling from a bridge at a school camp in the Hunua Ranges.

A police spokeswoman said the boy appeared to have ended up in the water at Auckland's Camp Adair about 8.20pm yesterday.

The Westpac Auckland Rescue Helicopter flew him to Waikato Hospital in a moderate condition.

WorkSafe had been notified of the incident and was making inquiries, a spokeswoman said.