| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Callum O'Keefe | Lindisfarne College | 52.81q |
| 2 | Sebastian Skelton | Scots College | 53.20q |
| 3 | Jordan Veitch | Christchurch Boys High School | 53.39q |
| 4 | Robert Unsworth | Otumoetai College | 54.00q |
| 5 | Zane Wakeling | Kapiti College | 56.00q |
| 6 | Lachlan List | Roncalli College | 57.88q |
| 7 | William O'Connell | Sacred Heart College (Auckland | 59.75 |
| 8 | Lyon Rodger | Rathkeale College/Trinity Seni | 59.89 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | William Laing | Roncalli College | 55.88q |
| 2 | Sacha Tahi | Christchurch Boys High School | 56.59q |
| 3 | William Cole | Rathkeale College/Trinity Seni | 57.83q |
| 4 | Thomas Gowan | Whanganui High School | 59.28q |
| 5 | Harvey Cogle | St Thomas Of Canterbury Colleg | 59.51 |
| 6 | Bill Quigley | Timaru Boys' High School | 1:02.81 |
| 7 | Levi Waihi | Whakatane High School | 1:13.31 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Millar McElrea | Tokomairiro High School | 55.29q |
| 2 | Harper Ubiaga | Wellington College | 55.90q |
| 3 | Liam Thornhill | Bream Bay College | 57.39q |
| 4 | James Shand | Dilworth School | 59.14q |
| 5 | Chase Morpeth | Whanganui High School | 1:01.01 |
| 6 | Alvin Xu | Green Bay High School | 1:02.45 |
| -- | Jesse Park | Auckland Grammar School | DQ |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Kian Trebes | Hamilton Boys High School | 55.64q |
| 2 | Jonty Roil | Lindisfarne College | 57.14q |
| 3 | Couper Killick | St Andrew's College | 57.24q |
| 4 | Joshua Allen | St Patrick's College (Silverst | 57.58q |
| 5 | Ethan Hardy | Avondale College | 1:00.11 |
| 6 | Alistair Cameron | Whanganui High School | 1:01.67 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jacob Douglas | Rototuna High School | 54.05q |
| 2 | Ollie Singleton | Christchurch Boys High School | 56.08q |
| 3 | Kahurangi Cotterill | Kings College | 56.09q |
| 4 | Oliver Kelly | Sacred Heart College (Auckland | 56.11q |
| 5 | Alex McCorkindale | St Thomas Of Canterbury Colleg | 56.54q |
| 6 | Mitchell Taylor | Tauranga Boys' College | 56.56q |
| 7 | Fletcher Van Heuven | Matamata College | 1:00.77 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Callum O'Keefe | Lindisfarne College | 53.36q |
| 2 | Sebastian Skelton | Scots College | 53.85q |
| 3 | Kahurangi Cotterill | Kings College | 54.66q |
| 4 | Thomas Gowan | Whanganui High School | 55.04 |
| 5 | Harper Ubiaga | Wellington College | 55.04 |
| 6 | Oliver Kelly | Sacred Heart College (Auckland | 55.59 |
| 7 | Couper Killick | St Andrew's College | 55.62 |
| 8 | Alex McCorkindale | St Thomas Of Canterbury Colleg | 55.66 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Jordan Veitch | Christchurch Boys High School | 53.67q |
| 2 | William Laing | Roncalli College | 54.05q |
| 3 | Mitchell Taylor | Tauranga Boys' College | 56.73 |
| 4 | Ollie Singleton | Christchurch Boys High School | 57.23 |
| 5 | Liam Thornhill | Bream Bay College | 58.54 |
| 6 | James Shand | Dilworth School | 1:00.16 |
| -- | Jacob Douglas | Rototuna High School | DNS |
| -- | Zane Wakeling | Kapiti College | DQ |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Millar McElrea | Tokomairiro High School | 54.21q |
| 2 | Robert Unsworth | Otumoetai College | 54.30q |
| 3 | Kian Trebes | Hamilton Boys High School | 54.45q |
| 4 | William Cole | Rathkeale College/Trinity Seni | 56.24 |
| 5 | Sacha Tahi | Christchurch Boys High School | 56.74 |
| 6 | Jonty Roil | Lindisfarne College | 57.05 |
| 7 | Joshua Allen | St Patrick's College (Silverst | 58.07 |
| 8 | Lachlan List | Roncalli College | 58.70 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Sebastian Skelton | Scots College | 52.35 |
| 2 | Jordan Veitch | Christchurch Boys High School | 52.68 |
| 3 | Millar McElrea | Tokomairiro High School | 53.21 |
| 4 | William Laing | Roncalli College | 53.80 |
| 5 | Callum O'Keefe | Lindisfarne College | 53.84 |
| 6 | Robert Unsworth | Otumoetai College | 53.99 |
| 7 | Kian Trebes | Hamilton Boys High School | 54.57 |
| 8 | Kahurangi Cotterill | Kings College | 57.63 |