Records
8 Advance: Top 2 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 674 Dylan Ge | Ku-Ring-Gai | 17.23Q | 3 | |
| 2 | 872 Hayden Halvorsen | Ku-Ring-Gai | 18.17Q | 2 | |
| 3 | 15734 Kyza Sutton | Hornsby | 18.99Q | 1 | |
| 4 | 15358 Jordan Lee | Hornsby | 17.44Q | 3 | |
| 5 | 327 Kylian Huang | Ku-Ring-Gai | 18.18Q | 2 | |
| 6 | 14898 Carter Hicks | Mosman | 19.44Q | 1 | |
| 7 | 724 Joshua Veasey | Ku-Ring-Gai | 17.93q | 3 | |
| 8 | 14942 Austin Packwood | Mosman | 19.16q | 2 | |
| 9 | 6513 Oscar Louis | Manly Warringah | 19.47 | 2 | |
| 10 | 913 Lewis Tucker | Ku-Ring-Gai | 19.54 | 1 | |
| 11 | 7040 Hamish Windsham | Manly Warringah | 19.58 | 1 | |
| 12 | 15086 Zachary Chen | Mosman | 19.59 | 2 | |
| 13 | 15726 Samuel Schmidt | Hornsby | 20.50 | 3 | |
| 14 | 6557 James McDermott | Manly Warringah | 20.67 | 2 | |
| 15 | 6696 Ryan Stephenson | Manly Warringah | 21.43 | 1 | |
| 16 | 21956 Hudson Wiles | Northern Districts | 21.62 | 1 | |
| -- | 6986 Tyde Moloney | Manly Warringah | DNS | 3 | |
| -- | 21884 Jack Baker | Northern Districts | DNS | 3 |