| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Leigh Grieve | Dunstan High School | 57.10q |
| 2 | Josiah Hutchison | Blue Mountain College | 57.23q |
| 3 | Dominik Yanzick | St Kevin's College | 58.37q |
| 4 | Hayden Fleury | Kings High School | 1:02.15q |
| 5 | Christopher Moulton | St Kevin's College | 1:03.54 |
| 6 | Zane McTainsh | Taieri College | 1:04.21 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | ben jowsey | Kaikorai Valley College | 57.23q |
| 2 | Michael Ogle | Otago Boys High School | 58.16q |
| 3 | Jeremy Morris | John McGlashan | 58.85q |
| 4 | Kevin Wu | Kavanagh College | 1:02.94q |
| -- | Brad McDonald | Otago Boys High School | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | ben jowsey | Kaikorai Valley College | 55.94 |
| 2 | Michael Ogle | Otago Boys High School | 56.53 |
| 3 | Josiah Hutchison | Blue Mountain College | 57.23 |
| 4 | Jeremy Morris | John McGlashan | 57.85 |
| 5 | Leigh Grieve | Dunstan High School | 58.52 |
| 6 | Dominik Yanzick | St Kevin's College | 1:00.63 |
| 7 | Kevin Wu | Kavanagh College | 1:02.26 |
| 8 | Hayden Fleury | Kings High School | 1:05.11 |