| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Rhian Douglas | Waimea College | 51.00q |
| 2 | Cody Lawson | Southland Boys High School | 51.41q |
| 3 | Josh Mitchell | Independent Home School Athlet | 54.82q |
| 4 | Isaac Johnstone | Tauranga Boys' College | 55.51 |
| 5 | Julian Syben | St Peter's School | 57.51 |
| 6 | Jude Smillie | Otago Boys High School | 57.99 |
| 7 | Hosea Wood | Burnside High School | 1:00.83 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Isaac Saywell | St Bede's College | 52.56q |
| 2 | Aidan Platts | Botany Downs Secondary College | 53.27q |
| 3 | Aidan Galley | New Plymouth Boys High School | 54.03q |
| 4 | Patrick Dawson | Roncalli College | 57.84 |
| 5 | Rishaan Kumar | Ashburton College | 59.36 |
| 6 | Riley Horne | Otago Boys High School | 1:00.02 |
| 7 | Taane Wetere | St Peter's School | 1:02.15 |
| 8 | Moses Corerega | Fiji Athletics | 1:02.71 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Noa King | Northcote College | 52.10q |
| 2 | Max Lewer | St Patrick's College (Silverst | 52.81q |
| 3 | Ollie Jackways | St Andrew's College | 56.46 |
| 4 | Jacob Howell | Westlake Boys High School | 56.61 |
| 5 | Charles Edge | Rathkeale College/Trinity Seni | 58.74 |
| 6 | Solomon Hawes | Christchurch Boys High School | 59.05 |
| -- | Liam Smith | Taradale High School | DNS |
| -- | Lyshan Yue | Burnside High School | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Rhian Douglas | Waimea College | 49.93 |
| 2 | Isaac Saywell | St Bede's College | 51.38 |
| 3 | Noa King | Northcote College | 51.91 |
| 4 | Cody Lawson | Southland Boys High School | 52.03 |
| 5 | Aidan Platts | Botany Downs Secondary College | 52.22 |
| 6 | Max Lewer | St Patrick's College (Silverst | 53.47 |
| 7 | Josh Mitchell | Independent Home School Athlet | 53.76 |
| 8 | Aidan Galley | New Plymouth Boys High School | 54.69 |