Records
8 Advance: Top 2 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 6778 Harry Dryden | Manly Warringah | 15.24Q | 1 | |
| 2 | 6577 Eli Delrennie | Manly Warringah | 15.31Q | 2 | |
| 3 | 502 Joshua Potgieter | Ku-Ring-Gai | 15.39Q | 3 | |
| 4 | 6410 Heath Towers | Manly Warringah | 15.42Q | 3 | |
| 5 | 21763 Reef Bailey | Northern Districts | 15.47Q | 2 | |
| 6 | 14778 Hunter Vakili | Mosman | 15.67Q | 1 | |
| 7 | 21621 Harrison Boyd | Northern Districts | 15.69q | 2 | |
| 8 | 6552 Kieran Ling | Manly Warringah | 16.54q | 3 | |
| 9 | 665 Mitchell Harris | Ku-Ring-Gai | 16.59 | 1 | |
| 10 | 6759 Josh Rimmer | Manly Warringah | 16.98 | 1 | |
| 11 | 6400 Flynn Jauncey | Manly Warringah | 17.45 | 2 | |
| 12 | 15421 Zachariah Sharpham | Hornsby | 19.61 | 1 | |
| -- | 15144 Ziggy Staley-Lobo | Mosman | DNS | 3 | |
| -- | 7070 Sebastian Kelly | Manly Warringah | DNS | 3 | |
| -- | 6481 Billy Barnett | Manly Warringah | DNS | 2 | |
| -- | 14914 Orlando Clarke | Mosman | DNS | 1 | |
| -- | 7073 Leo Hindes | Manly Warringah | DNS | 3 |