Records
8 Advance: Top 3 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 6497 Harry Weir | Manly Warringah | 15.67Q | 2 | |
| 2 | 6769 Liam Lowe | Manly Warringah | 15.72Q | 1 | |
| 3 | 6736 Bodhi McGregor | Manly Warringah | 15.82Q | 2 | |
| 4 | 6478 Domenic Losurdo | Manly Warringah | 15.96Q | 1 | |
| 5 | 125 Luc Barkhuysen | Ku-Ring-Gai | 16.23Q | 2 | |
| 6 | 505 Teddy Thompson | Ku-Ring-Gai | 16.73Q | 1 | |
| 7 | 14744 Oliver Larkin | Mosman | 17.01q | 1 | |
| 8 | 834 Rylan Moriarty | Ku-Ring-Gai | 17.05q | 1 | |
| 9 | 573 Rory Kurath | Ku-Ring-Gai | 17.08 | 2 | |
| 10 | 589 Ayaan Lalji | Ku-Ring-Gai | 17.56 | 2 | |
| 11 | 14776 Louie Worton | Mosman | 18.18 | 1 | |
| 12 | 6792 Samuel Birch | Manly Warringah | 18.21 | 2 | |
| 13 | 15029 Vincent Qiu | Mosman | 18.41 | 1 |