| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | DJ Kilden | Christchurch Boys High School | 23.97q |
| 2 | Thomas Martin | St Bede's College | 24.07q |
| 3 | Keegan Bragg | St Andrew's College | 24.24q |
| 4 | Samuel Gilchrist | Christ's College | 24.26q |
| 5 | Jethro Palmer | Geraldine High School | 24.95 |
| 6 | Jesse Porter | Otago Boys High School | 25.29 |
| -- | Charlie Morrison | Ashburton College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Robert Jopp | John McGlashan College | 23.38q |
| 2 | Rodney Bungard | St Kevin's College | 23.62q |
| 3 | Quade Dearman | Nelson College | 24.00q |
| 4 | Jamie O'Connor | Central Southland College | 24.50q |
| 5 | Ben Johnson | Kings High School | 24.86 |
| 6 | Bradley Lang | Timaru Boys' High School | 24.96 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Robert Jopp | John McGlashan College | 23.30 |
| 2 | Thomas Martin | St Bede's College | 23.36 |
| 3 | Quade Dearman | Nelson College | 23.82 |
| 4 | DJ Kilden | Christchurch Boys High School | 23.83 |
| 5 | Rodney Bungard | St Kevin's College | 23.92 |
| 6 | Samuel Gilchrist | Christ's College | 24.29 |
| 7 | Keegan Bragg | St Andrew's College | 24.53 |
| 8 | Jamie O'Connor | Central Southland College | 24.76 |