| Name | Age | Club | Time | Splits | ||
| 1 | Ally Morrison | 12 | St Thomas | 1:13.53 | 35.51 | 1:13.53 |
| 2 | Freya Thomson | 12 | Perth City | 1:15.05 | 36.89 | 1:15.05 |
| 3 | Tristyn Jones | 12 | Dun City Aqu | 1:17.58 | 38.50 | 1:17.58 |
| 4 | Katrin Rough | 12 | Perth City | 1:18.83 | 38.59 | 1:18.83 |
| 5 | Ailsa Young | 12 | M/Whall | 1:18.84 | 38.65 | 1:18.84 |
| 6 | Christie Morrison | 12 | Perth City | 1:21.04 | 40.19 | 1:21.04 |