Trailing 16-6 with five minutes remaining, Nowra scored a dramatic try after the full-time siren to level the scores and kicked an extra time penalty goal to win.

It was a stunning reversal of last year's grand final, when the Knights downed the Jets in the additional time period.

Kiama were on the board after two minutes when Alex Westlake streaked away to score.

The Jets levelled up through Sian Silk, but Kiama again took a converted try lead when Alanna Smith crossed.

Nowra were made to pay for an error when right on half-time Erin Guy made it 16-6.

However, the missed conversion from in front would come back to haunt the Knights.

A scrappy second half ensued, but the defending premiers appeared to be in control of the contest.

A Belinda Chittleborough try with five minutes remaining set up a grandstand finish at 16-10.

Kiama's defence repelled several attacking raids and appeared to have the game won.

However they made a fatal error of judgment by not playing to the whistle.

Having possession deep in their own half, Knights players threw the ball away when the final siren sounded and began celebrating before the referee had signalled full-time.

The Jets pounced on the loose ball and Silk scored under the posts to send it into extra-time.

Shortly into the golden point period Roslyn Simpson kicked a penalty goal to clinch the title.

Player of the Match was Nowra's Tracey Coe.

Nowra-Bomaderry Jets 18 (Sian Silk 2, Belinda Chittleborough tries; Roslyn Simpson 2, Talia Atfield goals) defeated Kiama Knights 16 (Alex Westlake, Alanna Smith, Erin Guy tries; Kristi Pan, Jamie-Lee Cotter goals).

In the under-18s grand final, minor premiers Albion Park-Oak Flats Eagles ran in 12 tries to three to totally outclass Milton-Ulladulla 66-18.