Records
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | Emilia Hum | Northern Suburbs | 39.26Q | 2 | |
| 2 | Eloise Lukas | Northern Suburbs | 39.35Q | 1 | |
| 3 | Eleanor Floyd | Ryde | 40.46Q | 1 | |
| 4 | Imogen Gilchrist | Cherrybrook | 41.82Q | 2 | |
| 5 | Isabella Kelly | Northern Suburbs | 41.35Q | 1 | |
| 6 | Anna Thwaites | Parramatta | 43.09Q | 2 | |
| 7 | Eva Smajovic | Parramatta | 44.44q | 1 | |
| 8 | Samantha Xu | Cherrybrook | 45.93q | 2 | |
| 9 | Nissi Gebhard | Northern Suburbs | 49.34 | 2 | |
| -- | Madeline Kien | Northern Suburbs | DNS | 2 | |
| -- | Bryanna Hu | Northern Suburbs | DNS | 1 |