| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Mark Loh | St Thomas Of Canterbury Colleg | 52.24q |
| 2 | Sam Horgan | St Bede's College | 52.73q |
| 3 | Joshua Friend | Otago Boys High School | 53.21q |
| 4 | Chris Ireland | Christ's College | 53.63q |
| 5 | William Rawlins | Timaru Boys' High School | 55.09 |
| 6 | Zebadiah Thompson | John Paul II High School | 55.36 |
| 7 | Isaac Vandenbosch | Twizel Area School | 57.44 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Zinan Bennett | Middleton Grange School | 52.12q |
| 2 | Will Ferguson | Christchurch Boys High School | 52.21q |
| 3 | Ben Lund | John McGlashan College | 53.52q |
| 4 | Matt Durant | Christ's College | 53.94q |
| 5 | Nathan Harrison | John McGlashan College | 54.50 |
| 6 | Wesley Klassan-Ladd | Nelson College | 57.75 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Mark Loh | St Thomas Of Canterbury Colleg | 50.39 |
| 2 | Zinan Bennett | Middleton Grange School | 52.05 |
| 3 | Will Ferguson | Christchurch Boys High School | 52.16 |
| 4 | Joshua Friend | Otago Boys High School | 52.27 |
| 5 | Sam Horgan | St Bede's College | 52.44 |
| 6 | Chris Ireland | Christ's College | 52.69 |
| 7 | Matt Durant | Christ's College | 53.83 |
| 8 | Ben Lund | John McGlashan College | 54.65 |