Emergency services were alerted to the incident on Ocean Drive, near Hillman Street at about 6am.

A spokesperson from NSW Police said the Harley Davidson motorcycle allegedly lost control and hit a brick wall of a North Haven café.

The rider is a man from Laurieton. He was treated at the scene by NSW Ambulance paramedics for a serious head injury before being airlifted to John Hunter Hospital in a stable condition.

Officers from Mid North Coast Police District established a crime scene and are investigating the circumstances surrounding the crash.

To report information about the incident please contact Crime Stoppers: 1800 333 000 or https://nsw.crimestoppers.com.au.

For the latest traffic information motorists are advised to visit www.livetraffic.com