Wet weather had forced the abandonment of the Final the previous weekend with Gold Coast in a strong position, and Wests did not miss the chance the second time around to register back-to-back titles and end the Dolphins hopes of winning two premierships in the season after winning the T20 title earlier in the summer.
Queensland Fire seam bowler Meagan Dixon delivered a match-defining spell with the ball, finishing with 3-20 from 10 overs as the Gold Coast was held to 219 after the home team had earlier made 8-239.
Wests batting effort was led by half centuries to Konica Minolta Queensland Fire and WBBL Brisbane Heat duo Josie Dooley (67) and Kirby Short (50) and 44 from Australian Under-19 allrounder Courtney Sippel.
Allrounder Tara Wheeler took 2-25 from six overs for the Dolphins while former Queensland Fire allrounder Belinda McDougall (nee Matheson) claimed 1-36 from 10 overs of off-spin to complete a strong comeback season after several years out of the game while starting a family.
The Gold Coast chase was led by Tasmanian and Hobart Hurricanes batter Georgia Redmayne, who hit a century last week in the rain-affected final.
Redmayne, now based in Queensland, top-scored with 67 but did not find the batting support she needed with the next highest score by Wheeler (37).
Fire pace bowler Holly Ferling was also impressive with the ball for Wests, claiming 3-22 from her 10 overs, while spinner Ashleigh Sims claimed 2-42.
Western Suburbs 8/239 (J Dooley 67, K Short 50, C Sippel 44; T Wheeler 2/25) def Gold Coast 219 (G Redmayne 67, T Wheeler 37; M Dixon 3/20, H Ferling 3/22)
Julia Price Award (Player of the Final) - Meagan Dixon, Western Suburbs