Records
8 Advance: Top 2 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 250 Sienna Vassella | Ku-Ring-Gai | 27.49Q | 3 | |
| 1 | 6693 Sarah Mehta | Manly Warringah | 27.49Q | 2 | |
| 3 | 6692 Louisa Mehta | Manly Warringah | 28.56Q | 1 | |
| 4 | 1531 Anais Biasi | Barker | 28.82Q | 3 | |
| 5 | 6638 Sophie Rogerson | Manly Warringah | 29.76Q | 1 | |
| 6 | 6467 Pilard Shephard | Manly Warringah | 30.49Q | 2 | |
| 7 | 1532 Ava Beatie | Barker | 28.92q | 3 | |
| 8 | 14983 Alexandra Davis | Mosman | 29.87q | 3 | |
| 9 | 6404 Eden McNaughtan | Manly Warringah | 30.79 | 2 | |
| 10 | 21862 Ruby McIntyre | Northern Districts | 31.04 | 2 | |
| 11 | 14865 Lottie Kennard | Mosman | 32.11 | 2 | |
| 12 | 21814 Sasha Sefton | Northern Districts | 33.46 | 1 | |
| -- | 15286 Lexi Hartigan | Mosman | DNS | 1 | |
| -- | 21852 Madison Haggarty | Northern Districts | DNS | 3 | |
| -- | 1511 Amalia Senevirante | Barker | DNS | 2 | |
| -- | 6616 Jemma Wilsher | Manly Warringah | DNS | 3 | |
| -- | 15178 Piper Aubin | Mosman | DNS | 1 | |
| -- | 7001 Trinity Perrett | Manly Warringah | DNS | 1 |