| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Leslie Taylor | Otago Boys High School | 53.15q |
| 2 | Jasper Kelly | Christ's College | 53.24q |
| 3 | Ben Speden | St Peter's College (Gore) | 53.35q |
| 4 | Paul Wyber | Otago Boys High School | 53.55q |
| 5 | Matthew Milmine | Waitaki Boys' High School | 53.84 |
| 6 | Andrew Hodgson | Timaru Boys' High School | 55.13 |
| 7 | Jeremy Markham | Mt Hutt College | 1:03.53 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Joel Armstrong | Middleton Grange School | 53.08q |
| 2 | Kalum Martinus | Greymouth High School | 53.11q |
| 3 | Garry Cregeen-Almond | Nelson College | 53.43q |
| 4 | Sam Briggs | St Andrew's College | 53.79q |
| 5 | Dillon Anderson | Motueka High School | 54.03 |
| 6 | Mark Taylor | Menzies College | 59.05 |
| -- | Darragh Kenny | St Bede's College | DNF |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Joel Armstrong | Middleton Grange School | 49.97 |
| 2 | Kalum Martinus | Greymouth High School | 52.08 |
| 3 | Sam Briggs | St Andrew's College | 52.27 |
| 4 | Leslie Taylor | Otago Boys High School | 52.40 |
| 5 | Garry Cregeen-Almond | Nelson College | 53.03 |
| 6 | Paul Wyber | Otago Boys High School | 53.81 |
| 7 | Ben Speden | St Peter's College (Gore) | 53.85 |
| -- | Jasper Kelly | Christ's College | DNS |