With countless tonnes of Southern Ocean chasing him down, Melbourne student Alastair McLeod has become the first person to windsurf the fearsome Eddystone Rock wave off southern Tasmania.

McLeod cut his windsurfer across waves with faces up to 10 m. high earlier this winter, making them some of the largest ever windsurfed outside Hawaii.

The 23 year-old Monash University student said he honestly doubted whether the ride would be possible.

"It's without a doubt the most dangerous thing I've ever done, but one of the most rewarding as well.