A surfer has miraculously driven himself to hospital after being bitten twice on the leg by a shark at a popular break in South Australia.

The man, aged in his 50s, was surfing at D’Estrees Bay - a popular tourist spot on Kangaroo Island - when the attack took place shortly after 1pm on Tuesday.

Stunningly, the surfer managed to drive himself to hospital where is expected to undergo emergency surgery.

His injuries are believed to not be life-threatening, a South Australia police spokesperson told the Daily Mail.

The shark is believed to be a large bronze whaler, according to an unconfirmed witness report submitted to the South Australian Shark Watch Alert.