Records
8 Advance: Top 2 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 6735 Hudson McGregor | Manly Warringah | 28.03Q | 1 | |
| 2 | 6510 Brody Scott-Faul | Manly Warringah | 29.65Q | 2 | |
| 3 | 6785 Solomon Romyn | Manly Warringah | 30.97Q | 3 | |
| 4 | 118 Hamish Skeates | Ku-Ring-Gai | 29.16Q | 1 | |
| 5 | 6730 Lequintin Nicholso | Manly Warringah | 30.27Q | 2 | |
| 6 | 6583 Henry Thomas | Manly Warringah | 31.22Q | 3 | |
| 7 | 14984 Kingston Davis | Mosman | 30.79q | 2 | |
| 7 | 15374 Tadhg Crowley | Hornsby | 30.79q | 1 | |
| 9 | 15061 Luke Yates | Mosman | 31.10 | 2 | |
| 10 | 162 Julian Conway | Ku-Ring-Gai | 31.59 | 2 | |
| 11 | 640 Tommy Kay | Ku-Ring-Gai | 31.68 | 3 | |
| 12 | 178 Nico James-Taylor | Ku-Ring-Gai | 31.79 | 2 | |
| 13 | 21863 Mason McIntyre | Northern Districts | 32.27 | 3 | |
| 14 | 15514 Ethan Carlton | Hornsby | 34.56 | 1 | |
| 15 | 21793 Liam Cosier | Northern Districts | 36.04 | 3 | |
| -- | 218 Kye Lim | Ku-Ring-Gai | DNS | 1 | |
| -- | 48820 Benjamin Marker | Mosman | DNS | 1 | |
| -- | 15196 Thomas Woolgar | Mosman | DNS | 3 |