| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Christian Blackie | Otago Boys High School | 56.82q |
| 2 | Jacob Reese-Jones | St Bede's College | 57.60q |
| 3 | Eddie Streat | Waitaki Boys' High School | 58.49q |
| 4 | Eddie Johnson | Golden Bay High School | 58.73q |
| 5 | Joe Allison | John McGlashan College | 1:00.12 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Zac Saunders | Hornby High School | 57.38q |
| 2 | Jesse Houston | Mt Hutt College | 58.10q |
| 3 | Edze Bierema | Ashburton College | 58.68q |
| 4 | Nathan MacDonnell | Kings High School | 59.40q |
| 5 | Riley Haymes | Nayland College | 1:01.26 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Jesse Houston | Mt Hutt College | 53.64 |
| 2 | Christian Blackie | Otago Boys High School | 54.47 |
| 3 | Zac Saunders | Hornby High School | 55.27 |
| 4 | Jacob Reese-Jones | St Bede's College | 55.54 |
| 5 | Edze Bierema | Ashburton College | 56.75 |
| 6 | Nathan MacDonnell | Kings High School | 58.88 |
| 7 | Eddie Johnson | Golden Bay High School | 59.85 |
| -- | Eddie Streat | Waitaki Boys' High School | DNF |