Courtney Conlogue has won the Margaret River Pro with an upset over two-time world champion Carissa Moore in an epic final.

Conlogue capitalised on Moore’s early caution to defeat the overall series leader 16.93 to 13.13 on Wednesday and stop her romping to her third straight Margaret River Pro title.

“Phenomenal,” an ecstatic Conlogue said of her breakthrough win.

“Carissa’s been on such a stellar run and I was like, `maybe I can end it’.”

Hawaiian Moore still leads the women’s World Surfing League standings.

Moore has 28,000 points, while Conlogue is in second place with 21,700.

Australian Stephanie Gilmore is in third place with 19,300, ahead of compatriots Tyler Wright (16,900) and Sally Fitzgibbons (16,300).