| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Joel Armstrong | Middleton Grange School | 52.62q |
| 2 | Robert Brown | Kings High School | 53.79q |
| 3 | Gregory Robertson | Southland Boys High School | 54.20q |
| 4 | Andrew Hodgson | Timaru Boys' High School | 54.71q |
| 5 | Craig Smith | Christchurch Boys High School | 55.13 |
| 6 | Jordan Miller | Nayland College | 56.48 |
| 7 | Tim Egerton | Tuatapere Community College | 56.56 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Leslie Taylor | Otago Boys High School | 53.25q |
| 2 | Matthew Robinson | Southland Boys High School | 53.27q |
| 3 | Sam Briggs | Ashburton College | 53.56q |
| 4 | Matt Milmine | Waitaki Boys' High School | 54.73q |
| 5 | Hamish O'Connell | Christchurch Boys High School | 54.80 |
| 6 | Darragh Kenny | St Bede's College | 55.05 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Matthew Robinson | Southland Boys High School | 50.51 |
| 2 | Joel Armstrong | Middleton Grange School | 50.97 |
| 3 | Sam Briggs | Ashburton College | 52.86 |
| 4 | Robert Brown | Kings High School | 53.84 |
| 5 | Leslie Taylor | Otago Boys High School | 54.23 |
| 6 | Gregory Robertson | Southland Boys High School | 54.57 |
| 7 | Matt Milmine | Waitaki Boys' High School | 55.43 |
| 8 | Andrew Hodgson | Timaru Boys' High School | 55.89 |