| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Mattheus Pio | St Pauls Collegiate (Hamilton) | 40.06q |
| 2 | Connor Munro | Whanganui High School | 40.34q |
| 3 | Zinan Bennett | Middleton Grange School | 40.65q |
| 4 | Joseph Sinclair | Whanganui Collegiate | 41.57q |
| 5 | Tom Moloney | Auckland Grammar School | 42.95q |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Zachary Saunders | Botany Downs Secondary College | 42.45q |
| 2 | Lee Lober Chan | Auckland Grammar School | 43.22q |
| 3 | Cameron Moffitt | Otago Boys High School | 43.41q |
| 4 | Hamish McGiven | St Peter's School | 44.75 |
| 5 | Ryan Bayler | Whanganui High School | 48.59 |
| -- | Tony Su | Macleans College | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Mattheus Pio | St Pauls Collegiate (Hamilton) | 38.75 |
| 2 | Zinan Bennett | Middleton Grange School | 39.07 |
| 3 | Cameron Moffitt | Otago Boys High School | 39.27 |
| 4 | Connor Munro | Whanganui High School | 39.36 |
| 5 | Zachary Saunders | Botany Downs Secondary College | 41.00 |
| 6 | Joseph Sinclair | Whanganui Collegiate | 41.48 |
| 7 | Tom Moloney | Auckland Grammar School | 41.84 |
| 8 | Lee Lober Chan | Auckland Grammar School | 42.65 |