Records
8 Advance: Top 3 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 6434 James Atkins | Manly Warringah | 24.18Q | 1 | |
| 2 | 398 Maximillian Kyle | Ku-Ring-Gai | 25.08Q | 2 | |
| 3 | 6409 Deacon Pallpratt | Manly Warringah | 25.28Q | 2 | |
| 4 | 6560 Jake Wood | Manly Warringah | 25.57Q | 1 | |
| 5 | 638 Riley Bradshaw | Ku-Ring-Gai | 25.89Q | 1 | |
| 6 | 244 Callum Fawcett | Ku-Ring-Gai | 26.95Q | 2 | |
| 7 | 1018 Thomas Wickham | Ku-Ring-Gai | 26.90q | 1 | |
| 8 | 6811 Kornchawal Benolie | Manly Warringah | 27.35q | 2 | |
| 9 | 21867 Liam McIntyre | Northern Districts | 28.18 | 2 | |
| 10 | 6462 Max Donald | Manly Warringah | 29.23 | 1 | |
| 11 | 15453 Joel Ramsay | Hornsby | 29.57 | 1 | |
| -- | 641 Archie Kay | Ku-Ring-Gai | DNS | 2 | |
| -- | 15142 Harry Alexander | Mosman | DNS | 1 | |
| -- | 15245 Orlando Stewart | Mosman | DNS | 2 |