Professional surfer Chuck Patterson has had a close encounter with a couple of great white sharks.

Patterson was SUP surfing with friends at San Onofre beach, California, when the dangerous creatures surrounded his board.

The waterman filmed everything with the HD Pro camera during 15 minutes.

Watch the video, HERE.

The 9ft shark slapped the tail on the SUP board, but never quite showed the intention to attack Chuck Patterson. Another smaller juvenile did exactly the same thing.