It had been a tight and nervy affair in the first half of this domestic showpiece final with the best chances only being created as half-time approached.
Swansea were the first to go close when Jodie Passmore's free kick was well hit but matched by the save of Cardiff goalkeeper Ceryn Chamberlain.
Shortly afterwards, Swansea were denied again but on this occasion it was Cardiff captain Siobhan Walsh who defended superbly to block an effort from close range.
The entertainment levels rose during the second half and Cardiff City put themselves in front with a lovely goal. After Shannon Evans advanced with the ball up the right, she executed a well timed pass to teammate Alana Murphy, who finished well to make it 1-0 to the Bluebirds.
Following a foul in the Cardiff box just 10 minutes later, Swansea were awarded a penalty and with it a way back into the match. Jodie Passmore stepped up to make it 1-1 with a confident strike from the penalty spot.
Swansea sensed that the tide was turning in this fixture and their momentum saw them dangerous in attack but the what would turn out to be the winning goal came from an unlikely position out wide on Swansea's left wing. Somehow, her ball into the box beat Chamberlain at her near post to give the Swans a 2-1 lead.
Despite five minutes of added time and Cardiff sending bodies forward, Swansea held on to their slender lead to win the FAW Women's Cup.