Kiama's Lachlan Cramsie missed a golden opportunity to claim the Australian Pro Bodyboarding crown on Saturday at his home beach.

Cramsie, who turned 20 on Friday, held a narrow lead after the first three rounds of the national series.

He headed into the weekend's final event at Mystics knowing he needed another strong performance to hold off rivals.

But Cramsie's hopes were washed away in a shock first-round exit and he had to settle for third overall.

Davis Blackwell from Western Australia captured his maiden win on the pro tour, which lifted him to fourth in the overall standings.

Queenslander Jake Stone earned enough points to claim the series title and fellow Queenslander Joe Clarke was second.

"I'm just so stoked - I can't stop smiling," Stone said.

Clarke said the conditions had made it tough.

"That was just so heavy," he said.

"I just couldn't deal with the pressure of that out there. I've never experienced anything like it."

Davis was pleased to notch his first tour victory.

"I'm so happy," he said.

"To beat opposition like this makes it even sweeter."