| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| -- | Thomas Allan | Gore High School | q |
| -- | Chad Butson | Southland Boys High School | q |
| -- | Toby Flett | Otago Boys | q |
| -- | John Gilmour | Otago Boys | q |
| -- | Dee Jay Kennedy | James Hargest High School | q |
| -- | Cole McKenzie | Otago Boys | q |
| -- | William Penny | Southland Boys High School | q |
| -- | Ethan Smith | Central Southland College | q |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Chad Butson | Southland Boys High School | 23.91 |
| 2 | Toby Flett | Otago Boys | 24.04 |
| 3 | Thomas Allan | Gore High School | 24.09 |
| 4 | Dee Jay Kennedy | James Hargest High School | 24.12 |
| 5 | Cole McKenzie | Otago Boys | 24.99 |
| 6 | John Gilmour | Otago Boys | 25.82 |
| 7 | Ethan Smith | Central Southland College | 27.56 |
| -- | William Penny | Southland Boys High School | DNS |