The 19-year-old's contract extension comes amid a double-move by the club to lock down two impressive youngsters for the upcoming Ninja A-League campaign.
The shot-stopper will bring quality and experience to the Black Knights, having played 116 Isuzu UTE A-League games and collected nine caps for the All Whites. Â
Sail's departure was confirmed along with the exit of both centre-back Tomislav Mrcela and forward Nikola Mileusnic following the expiration of their respective contracts.
The signing confirmation is expected to come in the build-up to Wellington's Hahn Australia Cup quarter-final clash with NPL Victoria outfit Heidelberg United on Tuesday night.
A two-time Ninja A-League Premiership winner starred for Australia's Under-23 side en route to the 2025 ASEAN Women’s Championship MSIG Serenity Cup final.