| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| -- | Morgan Collier | Southland Boys High School | q |
| -- | Campbell Edwards | James Hargest High School | q |
| -- | James Harvey | Wakatipu High School | q |
| -- | Finley Hitchen | Central Southland College | q |
| -- | Caine Hopcroft | Northern Southland College | q |
| -- | Kevin McDowell | Verdon College | q |
| -- | Ben Speden | St Peter's College (Gore) | q |
| -- | Brandon Spencer | Southland Boys High School | q |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Brandon Spencer | Southland Boys High School | 23.68 |
| 2 | James Harvey | Wakatipu High School | 24.64 |
| 3 | Campbell Edwards | James Hargest High School | 25.42 |
| 4 | Caine Hopcroft | Northern Southland College | 25.68 |
| 5 | Ben Speden | St Peter's College (Gore) | 25.76 |
| -- | Morgan Collier | Southland Boys High School | DNS |
| -- | Finley Hitchen | Central Southland College | DNS |
| -- | Kevin McDowell | Verdon College | DNS |