The Fire's 62-run win denied the Breakers a spot in the WNCL Finals for the second year in a row, with Tasmania and South Australia to contest the Ruth Preddey Cup in Hobart on Sunday.
Allrounder Charli Knott led the way in a concerted team effort by Queensland, taking wickets, making a key run-out and being part of a crucial batting partnership.
Knott had 3-3 from four overs at one point, before finishing with3-24 from 10 overs. With the bat, she and Georgia Voll (52) put on 84 for the third wicket and helped lay a solid foundation for Queensland to push on to 7-214 from their 50 overs, with Ellie Johnston (34) kicking along the innings.
Her run out of Claire Moore, coupled with some smart glovework by impressive young wicket-keeper Caitlin Mair, helped keep the start of the NSW chase in check.
NSW lost wickets regularly, slumping to 8-64 at one stage, before a lower order fightback delayed the result. In the end, the Breakers finished with 9-152.
Pace bowlers Holly Ferling (1-28) and Georgia Prestwidge (1-28) completed campaigns of high quality with the ball, while Courtney Sippel did nicely to claim 2-27. Leg-spinner Grace Parsons also enjoyed her final outing of her debut season, snapping up 1-24 from 10 overs.
The teenage Mair was excellent again with the gloves, with a sharp one-hander to remove the dangerous Phoebe Litchfield one of two catches, as well as a neat stumping off Knott.
Queensland finished fifth overall, one point behind the ACT and NSW, with Tasmania well out on front to earn hosting rights as they chase their maiden WNCL title.