Records
8 Advance: Top 3 Each Heat plus Next 2 Best Times
| Place | Name | Age | Team | Prelims | H. |
|---|---|---|---|---|---|
| 1 | 24414 Isaac Worthy | Wollongong City | 15.23Q | 1 | |
| 2 | 29823 Elijah Gallina | Dapto | 15.68Q | 2 | |
| 3 | 24239 Austin Kershaw | Wollongong City | 15.34Q | 1 | |
| 4 | 24330 Emerson Hill | Wollongong City | 15.81Q | 2 | |
| 5 | 38649 Josh Nesbitt | Northern Illawarra | 16.96Q | 1 | |
| 6 | 26520 Theodore Lawford-S | Bowral | 17.54q | 1 | |
| 7 | 44860 Luca Della Casa | Wollondilly | 17.59q | 1 | |
| 8 | 29854 Liam Roth | Dapto | 17.77q | 1 | |
| -- | 48032 Sean Callander | Wollondilly | DNS | 2 | |
| -- | 24038 Fletcher Tapp | Wollongong City | DNS | 2 | |
| -- | 26473 Vien Kemp | Bowral | DNS | 2 |