South Coast surfer Sally Fitzgibbons fell narrowly short of claiming back-to-back World Surf League titles, but remains firmly in the world title race after losing to France's Johanne Defay in the US Open of Surfing final.

Defay made the most of poor surf to pip the Australian by 1.71 points in the dying minutes at Huntington Beach in California.

Fitzgibbons, who could be seen wearing a helmet and bandages after having to overcome a busted eardrum to win the previous event in Fiji, took the late lead via a classy reverse move.

But Defay responded immediately to seal a 13.54 to 11.83 triumph, the 21-year-old converting her first World Surf League final into her first career win.

"Gracious in defeat," was how Fitzgibbons summed up her mood, adding she had enjoyed the event despite the loss.

"I'm really happy to make the final. I just try to make the most out of every opportunity that comes my way.

"I'm just so blessed to be here and to be able to compete in this event. The crowds and the atmosphere they create is so awesome and there's so much support across the whole beach."

It was the second time Defay had beaten Fitzgibbons in this event, having done so in round one when she posted the competition's top heat score of 17.44 out 20.

"I don't think I can put it into words," a jubilant Defay said afterwards.

"It's hard to digest. This is definitely my biggest win."

Defay's win now means she has shot to No 6 in the rankings, while Fitzgibbons remains in third place behind new leader Courtney Conlogue and relegated No 2 Carissa Moore.

Fitzgibbons said she was now focused on taking a break and healing her eardrum.

"I had to really slow things down before this competition and I've been focused on keeping things calm and enjoying it down here," she said.

"It's going to take me some time to adjust to not wearing this helmet once I'm all healed."

AAP