| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Thomas Martin | St Bede's College | 55.77q |
| 2 | DJ Kilden | Christchurch Boys High School | 56.60q |
| 3 | Brandon Gleaves | Middleton Grange School | 59.79q |
| 4 | Gavin Stark | Blue Mountain College | 59.83q |
| 5 | Mitchell Hunt | Nelson College | 1:00.97q |
| 6 | Samuel Smith | James Hargest College. | 1:01.15 |
| 7 | Metua Aerenga | Southland Boys High School | 1:01.16 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jethro Palmer | Geraldine High School | 58.93q |
| 2 | Simon Van Dam | Tuatapere Community College | 1:01.71q |
| 3 | Samuel Gilchrist | Christ's College | 1:01.82q |
| 4 | Cowan Fearn | Waitaki Boys' High School | 1:02.14 |
| 5 | Jack Bloomfield | Otago Boys High School | 1:02.31 |
| 6 | Nicholas Hutchinson | Christ's College | 1:06.63 |
| 7 | Jacob Lightfoot | Waimate High School | 1:10.21 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Thomas Martin | St Bede's College | 54.00 |
| 2 | DJ Kilden | Christchurch Boys High School | 57.70 |
| 3 | Gavin Stark | Blue Mountain College | 59.10 |
| 4 | Brandon Gleaves | Middleton Grange School | 1:01.60 |
| 5 | Samuel Gilchrist | Christ's College | 1:02.50 |
| 6 | Simon Van Dam | Tuatapere Community College | 1:03.00 |
| 7 | Mitchell Hunt | Nelson College | 1:03.50 |
| -- | Jethro Palmer | Geraldine High School | DNS |