| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Andrew Whyte | South Otago High School | 54.35q |
| 2 | Josiah Hutchison | Blue Mountain College | 54.80q |
| 3 | Alistair Adams | Nelson College | 54.90q |
| 4 | Kurt Polson | Ashburton College | 59.22 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Sam Fitzgerald | Riccarton High School | 56.71q |
| 2 | William Mohammed | Christ's College | 57.76q |
| 3 | Ben Jowsey | Kaikorai Valley College | 57.79q |
| 4 | Michael Ogle | Otago Boys High School | 58.21q |
| 5 | Jack Egerton | Tuatapere Community College | 58.64q |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Ben Jowsey | Kaikorai Valley College | 52.59 |
| 2 | Andrew Whyte | South Otago High School | 53.25 |
| 3 | Alistair Adams | Nelson College | 54.19 |
| 4 | Josiah Hutchison | Blue Mountain College | 55.20 |
| 5 | Sam Fitzgerald | Riccarton High School | 55.98 |
| 6 | William Mohammed | Christ's College | 56.67 |
| 7 | Michael Ogle | Otago Boys High School | 57.55 |
| 8 | Jack Egerton | Tuatapere Community College | 58.58 |