The race circuit, a 150-metre swim and one-kilometre run, starts near the Warrnambool breakwater.

The athlete who completes the most laps in one hour will take out the title.

Race organiser and 2012 winner Travis Greening, who completed 10 laps last year, said the aquathon was a popular event which catered for all competitors.

“A lot of people get concerned about a race — ‘I don’t want to come last’ — but you don’t know who is coming last,” he said.

“You can stop for a while or keep going.

“It’s more fun and not as serious as our other races.

“It is quite sheltered in there for swimming and there are no waves.”

Greening said the tri club would take entries on the night. “We have done it for a few years in a row now and run it between Christmas and new year,” he said. 

“We always pick up a few holidaymakers. 

“Last year we had between 60 and 70 and to get that again would be good.”

The aquathon starts at 6pm.

Warrnambool Tri Club’s next big event is the foreshore triathlon on February 1 and 2, while its Sufferfest, scheduled in March, is its biggest competition each season.