| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Michael Ogle | Otago Boys High School | 56.85q |
| 2 | Josiah Hutchison | Blue Mountain College | 57.00q |
| 3 | Nick Galwey | Mackenzie College | 57.22q |
| 4 | Brett Dickens | Nayland College | 57.33q |
| 5 | Axel McCort | Burnside High School | 1:00.56 |
| 6 | Angus Heslop | Ellesmere College | 1:01.22 |
| 7 | Levi Hart | Geraldine High School | 1:01.71 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Ben Jowsey | Kaikorai Valley College | 56.05q |
| 2 | Adin Martinus | Greymouth High School | 56.13q |
| 3 | Robert Mensen | Geraldine High School | 57.32q |
| 4 | Sam Fitzgerald | Riccarton High School | 57.69q |
| 5 | Matt Patterson | Southland Boys High School | 57.71 |
| 6 | Michael Jones | St Bede's College | 58.15 |
| 7 | Jack Egerton | Tuatapere Community College | 58.37 |
| 8 | Hector Roose Clark | St Andrew's College | 58.65 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Ben Jowsey | Kaikorai Valley College | 52.70 |
| 2 | Adin Martinus | Greymouth High School | 54.74 |
| 3 | Robert Mensen | Geraldine High School | 55.78 |
| 4 | Josiah Hutchison | Blue Mountain College | 56.75 |
| 5 | Brett Dickens | Nayland College | 56.90 |
| 6 | Michael Ogle | Otago Boys High School | 56.92 |
| 7 | Nick Galwey | Mackenzie College | 58.07 |
| 8 | Sam Fitzgerald | Riccarton High School | 58.64 |