Records
8 Advance: Top 3 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 6614 Jacob Alexander | Manly Warringah | 11.05Q | 1 | |
| 2 | 6456 Tommy Black | Manly Warringah | 11.15Q | 2 | |
| 3 | 6458 Jack Vukovic | Manly Warringah | 11.06Q | 1 | |
| 4 | 761 Evan He | Ku-Ring-Gai | 11.41Q | 2 | |
| 5 | 376 Julian Pita | Ku-Ring-Gai | 11.10Q | 1 | |
| 6 | 6803 Lachlan Creighton | Manly Warringah | 11.80Q | 2 | |
| 7 | 676 Hugo Ruff | Ku-Ring-Gai | 11.74q | 1 | |
| 8 | 6480 Kai Cocks | Manly Warringah | 11.90q | 1 | |
| 9 | 15175 James Kirby | Mosman | 12.07 | 1 | |
| 10 | 400 Hamish McGill | Ku-Ring-Gai | 12.13 | 2 | |
| -- | 296 Lucas Huang | Ku-Ring-Gai | DNS | 1 | |
| -- | 15545 Leo Zhao | Hornsby | DNS | 2 | |
| -- | 21747 Ryan Regmi | Northern Districts | DNS | 2 | |
| -- | 14820 Xavier Lane | Mosman | DNS | 2 |