Wetsports Diving Club is sending a dozen divers to the Surf Coast on Sunday morning armed with irons, ironing boards and crumpled items of clothing.

Their mission is to help smash the world record for extreme underwater ironing.

The call is out for 200 divers to take the plunge off St Leonard's Pier, near Geelong.

Guinness World Record officials will be waiting, pens poised, to lodge the feat into their history books.

Geelong is the reigning world-record holder in the event after 70 ironing men and women took their washing to a pool in 2005.

Wetsports Diving Club manager Matt Nicholas had heard tales of the extreme sport and the club decided to give it a go.

"I've done a lot of extreme sports like snowboarding and diving and you hear about extreme ironing but just kind of laugh it off. Then we heard through Melbourne groups this was going to happen and we put the word out there," Nicholas said.

"I've said to a lot of the guys if the missus was on their backs to help out with the ironing I guarantee she won't anymore if you do this.

"It will totally wreck the iron and your clothes will be all salt-water ruined."

Extreme underwater ironing was pioneered by a group of Germans and involves setting up an ironing board and electric iron (minus electricity) somewhere wet then taking a photo to prove your completed chore - the more extreme the better.

Other ironing enthusiasts have also completed the task off cliff faces, while skiing or parachuting and in war zones. There is no depth or timing restrictions for the Guinness record attempt but all ironers must hold complete diver registration, certification card and log book.