| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Ross Campbell | Otago Boys | 1:01.41q |
| 2 | Rhian Ward | Dunstan | 1:02.12q |
| 3 | sam Porter | East Otago High School | 1:03.65q |
| 4 | liam aston | Wakatipu High School | 1:05.55q |
| 5 | Todd Ellis | Northern Southland College | 1:08.74q |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Josh Vou | Otago Boys | 59.69q |
| 2 | Leighton Van Rooijen | Central Southland College | 1:06.77q |
| 3 | Joseph Steiner | Central Southland College | 1:08.15q |
| -- | Shea Robertson | South Otago | DNS |
| -- | Jharn Winter | Southland Boys High School | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Ross Campbell | Otago Boys | 1:00.42 |
| 2 | Rhian Ward | Dunstan | 1:00.89 |
| 3 | Josh Vou | Otago Boys | 1:01.72 |
| 4 | liam aston | Wakatipu High School | 1:02.25 |
| 5 | sam Porter | East Otago High School | 1:02.62 |
| 6 | Leighton Van Rooijen | Central Southland College | 1:08.33 |
| 7 | Joseph Steiner | Central Southland College | 1:13.15 |
| -- | Todd Ellis | Northern Southland College | DNS |