| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Cameron Hay | Christchurch Boys High School | 55.76q |
| 2 | Shea Thompson | Geraldine High School | 57.92q |
| 3 | Liam Cosgrove | Roncalli College | 58.56q |
| 4 | Campbell Smith | St Andrew's College | 59.33 |
| 5 | Jonathon Lord | Timaru Boys' High School | 1:00.98 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | John Snow | John McGlashan College | 55.42q |
| 2 | Ross Campbell | Otago Boys High School | 55.92q |
| 3 | Adam Pauling | Nayland College | 56.32q |
| 4 | sam Porter | East Otago High School | 57.11q |
| 5 | Alex Frew | St Bede's College | 57.19q |
| 6 | Charlie Hantler | John McGlashan College | 57.60 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Cameron Hay | Christchurch Boys High School | 53.30 |
| 2 | John Snow | John McGlashan College | 54.82 |
| 3 | Adam Pauling | Nayland College | 55.40 |
| 4 | Ross Campbell | Otago Boys High School | 55.42 |
| 5 | Shea Thompson | Geraldine High School | 56.33 |
| 6 | Liam Cosgrove | Roncalli College | 57.04 |
| 7 | sam Porter | East Otago High School | 57.32 |
| -- | Alex Frew | St Bede's College | DNS |