| Pos | Name | Age | Club | Time | Splits | |
|---|---|---|---|---|---|---|
| 1 | Mollie Grubb | 11 | Dun City Aqu | 1:38.00 | 45.67 | 1:38.00 |
| 2 | Georgia McLeod | 11 | Dun City Aqu | 1:38.68 | 46.46 | 1:38.68 |
| 3 | Natasha Bissett | 11 | Dun City Aqu | 1:41.53 | 49.34 | 1:41.53 |
| 4 | Ella Whike | 11 | EHMX | 1:42.17 | 48.15 | 1:42.17 |
| 5 | Marcelina Struminska | 11 | Dun City Aqu | 1:53.70 | 54.04 | 1:53.70 |
| 6 | Freyja Aspinall | 11 | Haddington | 1:53.91 | 50.38 | 1:53.91 |