| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | David Makasini | Kavanagh College | 55.61q |
| 2 | Raymond O'Rourke | Napier Boys High School | 55.70q |
| 3 | John Wells | Christ's College | 55.74q |
| 4 | Tom Sullivan | John McGlashan College | 56.75q |
| 5 | John Mottus | Rolleston College | 57.47 |
| 6 | Flynn Johnston | Whanganui High School | 58.49 |
| 7 | Callum Hill | Otago Boys High School | 1:01.44 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jack Rodgers | Christchurch Boys High School | 53.20q |
| 2 | Luke Barrett | Rolleston College | 54.15q |
| 3 | Peter Sewell | Kavanagh College | 54.59q |
| 4 | Lex Revell-Lewis | Avondale College | 55.10q |
| 5 | Liam McKee | Hamilton Boys High School | 56.16q |
| 6 | Henry Russon | Motueka High School | 57.76 |
| 7 | Maysin Katene | Whanganui High School | 57.85 |
| 8 | Oliver Ashburn | Trident High School | 57.94 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Lee Lober Chan | Auckland Grammar School | 53.80q |
| 2 | Finn O'Sullivan | Christchurch Boys High School | 56.13q |
| 3 | Dylan Orr | Ellesmere College | 56.59q |
| 4 | Eamon Buick | Mt Albert Grammar | 57.54 |
| 5 | Aryan Rai | Burnside High School | 57.63 |
| 6 | Jack Oram | St Patrick's College (Silverst | 58.42 |
| -- | Hine Makaia | Niue High School | DQ |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jole Naufahu | Auckland Grammar School | 54.94q |
| 2 | Tomas Stobbe | Rangitoto College | 55.06q |
| 3 | Xavier Wehi YC | Christchurch Boys High School | 55.72q |
| 4 | Finn McLachlan | Burnside High School | 56.84q |
| 5 | Tristan Bennett | Middleton Grange School | 56.99 |
| 6 | Robert McIvor | Otago Boys High School | 58.89 |
| 7 | Cameron Mantell | St Bede's College | 1:00.12 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Lee Lober Chan | Auckland Grammar School | 53.40q |
| 2 | Jole Naufahu | Auckland Grammar School | 54.91q |
| 3 | Raymond O'Rourke | Napier Boys High School | 55.12q |
| 4 | Tomas Stobbe | Rangitoto College | 55.58q |
| 5 | John Wells | Christ's College | 55.63 |
| 6 | Tom Sullivan | John McGlashan College | 56.40 |
| 7 | Liam McKee | Hamilton Boys High School | 56.54 |
| 8 | Xavier Wehi YC | Christchurch Boys High School | 1:06.73 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Jack Rodgers | Christchurch Boys High School | 53.45q |
| 2 | Luke Barrett | Rolleston College | 54.72q |
| 3 | David Makasini | Kavanagh College | 55.05q |
| 4 | Peter Sewell | Kavanagh College | 55.22q |
| 5 | Lex Revell-Lewis | Avondale College | 55.61 |
| 6 | Finn O'Sullivan | Christchurch Boys High School | 58.62 |
| 7 | Finn McLachlan | Burnside High School | 1:01.03 |
| -- | Dylan Orr | Ellesmere College | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Jack Rodgers | Christchurch Boys High School | 52.30 |
| 2 | Luke Barrett | Rolleston College | 54.24 |
| 3 | Lee Lober Chan | Auckland Grammar School | 54.29 |
| 4 | Tomas Stobbe | Rangitoto College | 54.98 |
| 5 | David Makasini | Kavanagh College | 55.09 |
| 6 | Peter Sewell | Kavanagh College | 55.30 |
| 7 | Jole Naufahu | Auckland Grammar School | 55.40 |
| 8 | Raymond O'Rourke | Napier Boys High School | 55.50 |