| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Oliver Miller | St Peter's College Auckland | 50.33q |
| 2 | Luke Mercieca | Westlake Boys High School | 51.96q |
| 3 | Alex Mander | Mariehau High School | 52.40q |
| 3 | Liam Webb | Wellington College | 52.40q |
| 5 | George Fitzsimons | Kings College | 53.82q |
| 6 | Jimmy-James Duncan | Wanganui Collegiate | 54.38 |
| 7 | Matt Van Dalen | St Peter's School Camb | 54.69 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Alex Haye | St Patricks College Kilbirnie | 50.96q |
| 2 | Conor McGiven | St Peter's School Camb | 51.87q |
| 3 | James Young | St John's College | 52.69q |
| 4 | Louis Young | Mahurangi College | 52.85q |
| 5 | Nathan MacDonell | Kings High School | 53.44q |
| 6 | Connor Gordon | St Paul's Collegiate Ham | 53.95q |
| 7 | Braden Phillips | Pukekohe High School | 56.10 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Marcos Ingham | Rosmini College | 51.70q |
| 2 | Brett Hooper | Palmerston North Boys High Sch | 52.66q |
| 3 | Rupert Tudehope | Christchurch Boys High School | 53.09q |
| 4 | Mika Seltner-Jones | Avondale College | 53.56q |
| 5 | Hamish Dunbar | Timaru Boy's High School | 54.64 |
| -- | Christiann Smit | Lincoln High School | DNF |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Sam Stewart | James Hargest High School | 50.86q |
| 2 | Joshua Nairne | St Patricks College Kilbirnie | 51.51q |
| 3 | Liam Turner | Otago Boys High School | 52.33q |
| 4 | Daniel Watt | Shirley Boys High School | 52.82q |
| 5 | Chris Hill | Dunstan High School | 53.28q |
| 6 | Thomas Stewart | Wellington College | 53.88q |
| 7 | Richard Russell | St John College | 55.09 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Harry Symes | Wanganui Collegiate | 51.98q |
| 2 | Edze Bierema | St Andrews College | 52.01q |
| 3 | Ryan Wilkins | St Paul's Collegiate Ham | 52.58q |
| 4 | Hasan Adheem | St Peter's School Camb | 55.17 |
| 5 | Jack Gibson Scarlett | Scots College | 55.36 |
| 6 | Reece Chalklen | Shirley Boys High School | 57.32 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Harry Symes | Wanganui Collegiate | 51.60q |
| 2 | Luke Mercieca | Westlake Boys High School | 52.09q |
| 3 | Sam Stewart | James Hargest High School | 52.49q |
| 4 | Ryan Wilkins | St Paul's Collegiate Ham | 52.97q |
| 5 | Liam Turner | Otago Boys High School | 54.27 |
| 6 | Daniel Watt | Shirley Boys High School | 55.03 |
| 7 | Thomas Stewart | Wellington College | 55.40 |
| 8 | Nathan MacDonell | Kings High School | 55.52 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Alex Haye | St Patricks College Kilbirnie | 51.30q |
| 2 | Edze Bierema | St Andrews College | 51.52q |
| 3 | Marcos Ingham | Rosmini College | 53.17 |
| 4 | Rupert Tudehope | Christchurch Boys High School | 53.63 |
| 5 | James Young | St John's College | 54.10 |
| 6 | Brett Hooper | Palmerston North Boys High Sch | 55.77 |
| 7 | George Fitzsimons | Kings College | 57.57 |
| -- | Mika Seltner-Jones | Avondale College | DNS |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Oliver Miller | St Peter's College Auckland | 52.74q |
| 2 | Joshua Nairne | St Patricks College Kilbirnie | 53.05q |
| 3 | Conor McGiven | St Peter's School Camb | 53.99 |
| 4 | Louis Young | Mahurangi College | 55.00 |
| 5 | Connor Gordon | St Paul's Collegiate Ham | 55.55 |
| 6 | Alex Mander | Mariehau High School | 55.57 |
| 7 | Liam Webb | Wellington College | 56.00 |
| 8 | Chris Hill | Dunstan High School | 1:00.20 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Alex Haye | St Patricks College Kilbirnie | 48.02 |
| 2 | Oliver Miller | St Peter's College Auckland | 48.03 |
| 3 | Harry Symes | Wanganui Collegiate | 49.18 |
| 4 | Edze Bierema | St Andrews College | 50.15 |
| 5 | Joshua Nairne | St Patricks College Kilbirnie | 50.27 |
| 6 | Luke Mercieca | Westlake Boys High School | 50.47 |
| 7 | Sam Stewart | James Hargest High School | 50.99 |
| 8 | Ryan Wilkins | St Paul's Collegiate Ham | 51.76 |