In an entertaining match, both teams deserved credit for playing attacking football while enduring a strong southwesterly wind.
Supporters had only just found their seats when Technical went ahead. A well-directed throw from Matt Joy had Andy Coburn leaping high to head firmly towards the Ferrymead goal.
Bays keeper Adam Highfield fumbled the header to the ground, giving lurking Technical striker Aaron Burgess a simple tap-in to open the scoring in just the second minute.
While making the worst of starts, Ferrymead was jolted into the game and gradually dominated possession and attacking pressure as the half progressed.
Mainland Football golden boot winner Mauricio de Oliviera looked the most menacing threat, displaying superior technical skills on the ball.
The equaliser had an evitable feel to it as Ferrymead Bays pushed players forward and won a corner a minute before the break.
The well-flighted corner evaded everyone except Bays midfielder Ciaran Aherne, who timed his run to perfection to drive the ball home from 10m.
Dunedin Technical grabbed the initiative in the 56th minute when Tristan Prattley delivered a sweetly timed free kick into the mixer. The buffeting wind and player indecision in the box had Prattley celebrating an unexpected goal as his free kick cannoned into the goal off the top of the upright.
Technical had one hand on the trophy two minutes later with arguably the goal of the match when Burgess received the ball inside the box, turned his defender inside out like a seasoned pro, and struck a laser shot into the top left-hand corner to notch his 40th goal in all competitions this season.
Despite possessing obvious quality, Ferrymead slumped in confidence as its attacking threats were constantly snuffed out by a solid Technical defensive effort under the expert supervision of Blair Scoullar.
The match was wrapped up in fine style in the 83rd minute when Prattley laced home a swerving free kick from 25m, leaving the Bays' defensive wall and goalkeeper exchanging blank stares.
Technical coach Mike Fridge was ecstatic after the victory.
"It was the classic game of two halves," he said.
"Both teams played easily their best football into the strong wind, which is a bit hard to fathom out. But that's football - it can be truly unpredictable."
- Wilson James