Records
8 Advance: Top 3 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 6595 Carter Neville | Manly Warringah | 38.61Q | 1 | |
| 2 | 15734 Kyza Sutton | Hornsby | 40.86Q | 2 | |
| 3 | 15358 Jordan Lee | Hornsby | 39.22Q | 1 | |
| 4 | 335 Harry Clark | Ku-Ring-Gai | 42.61Q | 2 | |
| 5 | 913 Lewis Tucker | Ku-Ring-Gai | 41.26Q | 1 | |
| 6 | 7040 Hamish Windsham | Manly Warringah | 42.99Q | 2 | |
| 7 | 122 Brooklyn Mao | Ku-Ring-Gai | 42.68q | 1 | |
| 8 | 15335 Myles Dewhurst | Hornsby | 43.77q | 2 | |
| 9 | 296 Lucas Huang | Ku-Ring-Gai | 45.69 | 2 | |
| 10 | 945 Freddie Blanc | Ku-Ring-Gai | 46.91 | 1 | |
| 11 | 15690 Yuvin Rajakumar | Hornsby | 49.10 | 2 | |
| 12 | 6691 Henry Owens | Manly Warringah | 49.20 | 2 | |
| 13 | 15726 Samuel Schmidt | Hornsby | 50.04 | 1 | |
| -- | 7109 Michael Kisona | Manly Warringah | DNS | 1 | |
| -- | 15086 Zachary Chen | Mosman | DNS | 2 | |
| -- | 6696 Ryan Stephenson | Manly Warringah | DNS | 1 |