Records
8 Advance: Top 2 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 6789 Josephine Han | Manly Warringah | 29.68Q | 3 | |
| 2 | 191 Nicole Shih | Ku-Ring-Gai | 29.82Q | 2 | |
| 3 | 6958 Aria Broadhurst | Manly Warringah | 31.20Q | 1 | |
| 4 | 14845 April Abboud | Mosman | 30.22Q | 3 | |
| 5 | 6746 Lexie Beesley | Manly Warringah | 30.90Q | 2 | |
| 6 | 419 Chloe Huang | Ku-Ring-Gai | 31.62Q | 1 | |
| 7 | 14724 Kate Shaw | Mosman | 31.67q | 2 | |
| 8 | 21874 Stephanie Ross | Northern Districts | 31.78q | 3 | |
| 9 | 14807 Sherlyn Na Lampoon | Mosman | 31.80 | 1 | |
| 10 | 443 Evelyn Finley | Ku-Ring-Gai | 31.85 | 2 | |
| 11 | 6484 Harlie Nugent | Manly Warringah | 32.17 | 1 | |
| 12 | 6442 Grace Tague | Manly Warringah | 32.93 | 1 | |
| 13 | 21669 Emily Davies | Northern Districts | 33.02 | 3 | |
| 14 | 15436 Matilda Clementson | Hornsby | 34.29 | 2 | |
| 15 | 855 Anya Liu | Ku-Ring-Gai | 34.79 | 3 | |
| 16 | 14790 Tabitha Hindmarsh | Mosman | 34.97 | 3 | |
| 17 | 735 Emma Fartek | Ku-Ring-Gai | 35.76 | 2 | |
| 18 | Hornsby | 35.88 | 1 | ||
| -- | 21882 Valentina Salinas | Northern Districts | DNS | 3 | |
| -- | 21829 Matilda Haggarty | Northern Districts | DNS | 2 |