| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Ross Campbell | Otago Boys High School | 58.78q |
| 2 | Blake McAlevey-Scurr | Logan Park High School | 1:00.29q |
| 3 | sam Porter | East Otago High School | 1:01.54q |
| 4 | Luke Maker | Kings High School | 1:09.89 |
| 5 | James Meldrum | Otago Boys High School | 1:16.36 |
| -- | Mitchell Finnie | Kings High School | DNS |
| -- | Charlie Hantler | John McGlashan | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Josh Vou | Otago Boys High School | 58.66q |
| 2 | Shea Robertson | South Otago High School | 59.17q |
| 3 | Rhian Ward | Dunstan High School | 1:00.62q |
| 4 | Hamish Cooper | Otago Boys High School | 1:03.47q |
| 5 | Will Meiklejohn | Kings High School | 1:05.65q |
| 6 | Jashiv Narayan | St Kevin's College | 1:07.37 |
| 7 | peter molteno | Logan Park High School | 1:09.46 |
| -- | John Snow | John McGlashan | DQ |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Ross Campbell | Otago Boys High School | 57.80 |
| 2 | Josh Vou | Otago Boys High School | 59.16 |
| 3 | Shea Robertson | South Otago High School | 59.44 |
| 4 | sam Porter | East Otago High School | 1:00.46 |
| 5 | Blake McAlevey-Scurr | Logan Park High School | 1:01.89 |
| 6 | Will Meiklejohn | Kings High School | 1:05.93 |
| 7 | Rhian Ward | Dunstan High School | 1:07.98 |
| 8 | Hamish Cooper | Otago Boys High School | 1:09.72 |