He was pulled from the surf at Greenmount Beach around 5.15pm on Tuesday with serious leg injuries.

Surf Life Saving Queensland members training nearby were among the first to provide help, along with Gold Coast City Council lifeguards, a Queensland Ambulance Service spokeswoman said.

The man was pronounced dead by paramedics at the scene, a Queensland Ambulance Service spokeswoman said.

Beaches both north and south of Greenmount Beach were immediately closed after the attack.

- with Australian Associated Press