| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Cody Lawson | Southland Boys High School | 52.93 |
| 2 | Isaac Saywell Barbosa | St Bede's College | 52.95 |
| 3 | Thomas Jenkins | Kings High School | 55.33 |
| 4 | Rishaan Kumar | Ashburton College | 56.75 |
| 5 | Joshua Dos Santos | Middleton Grange School | 58.67 |
| 6 | Solomon Hawes | Christchurch Boys High School | 59.19 |
| 7 | Bohdi Trevor-Smith | Fiordland College | 1:00.31 |
| 8 | Logan Campbell | Central Southland College | 1:03.71 |