The encounter happened Saturday as the kayaker fished off the shore of Santa Barbara.
A Go-Pro camera mounted on the kayaker’s head shows him hitting the shark with his oar as the shark circles his kayak. The whole incident lasted about 15 minutes.
The fisherman said he hit the shark about 20 times before the shark swam away.
Hammerhead sharks are rarely seen near the shore however, warm weather and currents from the south made southern California waters warmer than usual.