| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Tim Manson | Christ's College | 54.74q |
| 2 | Glen Beadle | Taieri College | 55.57q |
| 3 | Kalum Martinus | Greymouth High School | 56.40q |
| 4 | William Sew Hoy | John McGlashan | 58.56 |
| 5 | Glen Marshall | James Hargest High School | 1:00.90 |
| -- | Tim Couprie | Middleton Grange School | DNS |
| -- | Cameron Mitchell | St Andrew's College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Brandon Spencer | Southland Boys High School | 54.33q |
| 2 | Ryan Neutze | Geraldine High School | 54.90q |
| 3 | Hamish Upton | Nayland College | 55.62q |
| 4 | Richard Thompson | Timaru Boys' High School | 56.11q |
| 5 | Morgan Collier | Southland Boys High School | 56.45q |
| 6 | Tom Currie | Nelson College | 57.60 |
| 7 | Scott Thompson | Kaikoura High School | 58.99 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Brandon Spencer | Southland Boys High School | 49.91 |
| 2 | Ryan Neutze | Geraldine High School | 53.40 |
| 3 | Tim Manson | Christ's College | 54.00 |
| 4 | Morgan Collier | Southland Boys High School | 54.35 |
| 5 | Hamish Upton | Nayland College | 54.80 |
| 6 | Kalum Martinus | Greymouth High School | 55.38 |
| 7 | Richard Thompson | Timaru Boys' High School | 55.88 |
| 8 | Glen Beadle | Taieri College | 57.37 |