Records
8 Advance: Top 1 Each Heat plus Next 4 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 21722 Jensen Barrett | Northern Districts | 28.06Q | 3 | |
| 2 | 15140 Edward Sharp | Mosman | 28.53Q | 1 | |
| 3 | 14914 Orlando Clarke | Mosman | 28.74Q | 2 | |
| 4 | 6410 Heath Towers | Manly Warringah | 28.81Q | 4 | |
| 5 | 6422 Lewis McNaughtan | Manly Warringah | 28.87q | 2 | |
| 6 | 269 Brody Johnson | Ku-Ring-Gai | 29.32q | 1 | |
| 7 | 6784 Zane Romyn | Manly Warringah | 29.36q | 1 | |
| 8 | 6678 Callum Yates | Manly Warringah | 29.72q | 4 | |
| 9 | 6552 Kieran Ling | Manly Warringah | 29.88 | 2 | |
| 10 | 6944 Harrison Smith | Manly Warringah | 29.92 | 4 | |
| 11 | 7024 Jaxon Farrell | Manly Warringah | 29.94 | 2 | |
| 12 | 6718 Thomas Wilson | Manly Warringah | 30.11 | 2 | |
| 13 | 6523 Austin Grennan | Manly Warringah | 30.18 | 3 | |
| 14 | 14778 Hunter Vakili | Mosman | 30.30 | 1 | |
| 15 | 6843 Harley Ehnbom | Manly Warringah | 30.54 | 3 | |
| 16 | 14777 Harrison Vakili | Mosman | 30.85 | 3 | |
| 17 | 469 Oliver Finch | Ku-Ring-Gai | 31.32 | 2 | |
| 18 | 14937 Peter Phillipou | Mosman | 32.06 | 3 | |
| 19 | 108 Charlie Toth | Ku-Ring-Gai | 32.61 | 3 | |
| 20 | 6814 Edward Brennan | Manly Warringah | 33.52 | 1 | |
| -- | 15421 Zachariah Sharpham | Hornsby | DNS | 4 | |
| -- | 15592 Parker Pride | Hornsby | DNS | 2 | |
| -- | 245 Oliver Bullen | Ku-Ring-Gai | DNS | 1 | |
| -- | 681 Ethan Ryan | Ku-Ring-Gai | DNS | 4 | |
| -- | 6481 Billy Barnett | Manly Warringah | DNS | 4 | |
| -- | 7073 Leo Hindes | Manly Warringah | DNS | 3 | |
| -- | 912 Toby Ioia | Ku-Ring-Gai | DNS | 1 |