| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Ryan Alexander | Christ's College | 54.19q |
| 2 | Chad Butson | Southland Boys High School | 55.37q |
| 3 | Goodwin Williamson | Waitaki Boys' High School | 56.72q |
| 4 | Tim Hall | Waimea College | 57.07q |
| 5 | Jordan Anderson | Shirley Boys High School | 57.66 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Dee Jay Kennedy | James Hargest High School | 54.83q |
| 2 | Tomi Obafemi | Ashburton College | 55.91q |
| 3 | Ben Evans | St Bede's College | 56.52q |
| 4 | Martin Swart | Christchurch Boys High School | 57.40q |
| 5 | Ryan Ammar | Timaru Boys' High School | 58.94 |
| -- | Dillon Todd | Otago Boys High School | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Dee Jay Kennedy | James Hargest High School | 51.36 |
| 2 | Chad Butson | Southland Boys High School | 51.99 |
| 3 | Ryan Alexander | Christ's College | 52.29 |
| 4 | Tomi Obafemi | Ashburton College | 53.44 |
| 5 | Ben Evans | St Bede's College | 53.68 |
| 6 | Martin Swart | Christchurch Boys High School | 56.70 |
| 7 | Goodwin Williamson | Waitaki Boys' High School | 57.31 |
| 8 | Tim Hall | Waimea College | 58.78 |