It's being called a one-in-a-million miracle, the most incredible story of survival a young surfer, missing for 18 hours, turns up on a remote island off the coast of NSW.

Nineteen-year-old Darcy Deefholts was rescued after spending an entire night stranded on an island located eight miles off the coast of New South Wales, Australia.

To find out more, 10news were joined by one of his team of rescuers: Matt McLellan from Marine Rescue New South Wales.