| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Gus Rattray | Christ's College | 51.72q |
| 2 | Ben Evans | St Bede's College | 54.40q |
| 3 | Ryan Alexander | Christ's College | 54.63q |
| 4 | Daniel Koster | Shirley Boys High School | 56.02q |
| 5 | Scott Bridgman | Burnside High School | 56.47 |
| 6 | Matthew Van der Clay | St Thomas of Canterbury C | 57.23 |
| -- | Hayden Sinclair | St Bede's College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Hamish O'Connell | Christchurch Boys High Sc | 53.05q |
| 2 | Michael Sellwood | Darfield High School | 54.45q |
| 3 | Eddy van der Pol | Christchurch Boys High Sc | 54.76q |
| 4 | Luke Wium | Christ's College | 55.26q |
| 5 | James Schrader | St Bede's College | 57.88 |
| -- | Jonathon Lester | St Thomas of Canterbury C | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Gus Rattray | Christ's College | 51.19 |
| 2 | Hamish O'Connell | Christchurch Boys High Sc | 52.57 |
| 3 | Ryan Alexander | Christ's College | 52.65 |
| 4 | Ben Evans | St Bede's College | 53.44 |
| 5 | Eddy van der Pol | Christchurch Boys High Sc | 54.21 |
| 6 | Michael Sellwood | Darfield High School | 54.76 |
| 7 | Daniel Koster | Shirley Boys High School | 55.23 |
| 8 | Luke Wium | Christ's College | 57.03 |