Records
8 Advance: Top 2 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 181 Elena Chen | Ku-Ring-Gai | 33.12Q | 3 | |
| 2 | 6416 Rahni McNaughtan | Manly Warringah | 34.63Q | 1 | |
| 3 | 6564 Eloise Debney | Manly Warringah | 35.52Q | 2 | |
| 4 | 15131 Imogen Norris | Mosman | 34.21Q | 3 | |
| 5 | 6417 Jade Shanahan | Manly Warringah | 35.44Q | 1 | |
| 6 | 21861 Lily Cornwell | Northern Districts | 37.96Q | 2 | |
| 7 | 793 Isabelle Foster | Ku-Ring-Gai | 35.84q | 1 | |
| 8 | 192 Charlotte Shih | Ku-Ring-Gai | 36.24q | 3 | |
| 9 | 15730 Erica Dai | Hornsby | 36.84 | 3 | |
| 10 | 7002 Marley Swain | Manly Warringah | 38.43 | 2 | |
| 11 | 312 Rebecca Lua | Ku-Ring-Gai | 38.58 | 2 | |
| 12 | 6556 Elle McDermott | Manly Warringah | 39.08 | 3 | |
| -- | 15749 Aaira Aakhai | Hornsby | DNS | 1 | |
| -- | 15285 Veronica Soo | Mosman | DNS | 1 | |
| -- | 566 Anna Wang | Ku-Ring-Gai | DNS | 2 | |
| -- | 21580 Miranda Benitez Or | Northern Districts | DNS | 1 | |
| -- | 21883 Zoe Baker | Northern Districts | DNS | 3 |