| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Rhian Douglas | Waimea College | 23.72q |
| 2 | Alex Walker | John McGlashan College | 24.28q |
| 3 | Lucas Stevens | Christchurch Boys High School | 24.80q |
| 4 | Patrick Dawson | Roncalli College | 25.81q |
| 5 | Noel Ham | Christchurch Boys High School | 26.00q |
| 6 | Tom Matthews | Christ's College | 27.28 |
| 7 | Max Johansson | Westland High School | 27.35 |
| -- | Rahui Valli | Otago Boys High School | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Josh Mitchell | Te Aho o Te Kura Pounamu | 25.68q |
| 3 | Jeremy Habwe | Christchurch Boys High School | 26.38q |
| 4 | Jake McDowell-Kitto | Central Southland College | 26.41 |
| 5 | Ivan Orbase | Geraldine High School | 26.44 |
| 6 | Jack O'Neill | St Kevin's College | 26.59 |
| 7 | Te Ariki Roma | Kings High School | 26.75 |
| 8 | Pascal Omondiagbe | Middleton Grange School | 26.94 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Giancarlo Coribeer | Southland Boys High School | 27.58 |
| 2 | Leon Coribeer | Southland Boys High School | 27.82 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Rhian Douglas | Waimea College | 22.93 |
| 2 | Alex Walker | John McGlashan College | 23.99 |
| 3 | Lucas Stevens | Christchurch Boys High School | 24.32 |
| 4 | Josh Mitchell | Te Aho o Te Kura Pounamu | 25.39 |
| 5 | Noel Ham | Christchurch Boys High School | 25.70 |
| 6 | Jeremy Habwe | Christchurch Boys High School | 25.79 |
| 7 | Patrick Dawson | Roncalli College | 25.84 |