| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Matthew Leahy | St Peter's College (Auckland) | 53.18q |
| 2 | Sam Quinn | Westlake Boys High School | 54.56q |
| 3 | Dane Watson | Auckland Grammar School | 54.92q |
| 4 | Sam Fitzgerald | Riccarton High School | 55.08q |
| 5 | Joseph Steaurt-Muirhead | Wanganui Collegiate | 56.81q |
| 6 | James Perkinson | St Patrick's College (Silverst | 1:00.18 |
| 7 | Daniel Gregory-Campbell | Hastings Boys High School | 1:05.22 |
| -- | Mathew Harris | Whangaparaoa College | DQ |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jaxon Bonici | St Peter's College (Auckland) | 52.20q |
| 2 | Jack Oliver | Tawa College | 52.88q |
| 3 | James Calway | Howick College | 54.97q |
| 4 | Daniel Coronno | Rongotai College | 56.09q |
| 5 | Justin Jang | St John's College | 57.19 |
| 6 | Alex McRobie | Kristin School | 58.30 |
| 7 | Jamie Brassey | Mt Albert Grammar | 58.97 |
| 8 | Rhodri Williams | Francis Douglas Memorial Coll | 59.12 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Alistair Adams | St Peter's School | 53.51q |
| 2 | Dylan Te Maari | Rongotai College | 54.35q |
| 3 | Luke Ibbs | St Kentigern College | 54.92q |
| 4 | Kieran Tan | Scots College | 55.65q |
| 5 | James Leuthart-Tomlinson | Hauraki Plains College | 58.35 |
| 6 | Michael Goldie | Tauranga Boys' College | 1:02.26 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Sam Paddock | Wellington College | 55.82q |
| 2 | Campbell Wu | Auckland Grammar School | 56.63q |
| 3 | Jarrod Jennings | Hamilton Boys High School | 56.79q |
| 4 | Luke Tomlinson | Tawa College | 57.77 |
| 5 | Josh Gaby-Sutherland | St Peter's School | 1:00.22 |
| 6 | Ethan Wilson | Paeroa College | 1:03.24 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Jack Oliver | Tawa College | 53.01q |
| 2 | Jaxon Bonici | St Peter's College (Auckland) | 53.65q |
| 3 | Sam Fitzgerald | Riccarton High School | 54.57q |
| 4 | Jarrod Jennings | Hamilton Boys High School | 54.96q |
| 5 | Campbell Wu | Auckland Grammar School | 55.56 |
| 6 | Sam Paddock | Wellington College | 55.56 |
| 7 | Dane Watson | Auckland Grammar School | 55.82 |
| -- | Joseph Steaurt-Muirhead | Wanganui Collegiate | DNS |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Alistair Adams | St Peter's School | 53.06q |
| 2 | Matthew Leahy | St Peter's College (Auckland) | 53.64q |
| 3 | Dylan Te Maari | Rongotai College | 53.94q |
| 4 | Sam Quinn | Westlake Boys High School | 53.96q |
| 5 | James Calway | Howick College | 54.32 |
| 6 | Kieran Tan | Scots College | 56.40 |
| 7 | Luke Ibbs | St Kentigern College | 58.23 |
| 8 | Daniel Coronno | Rongotai College | 1:00.02 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Jaxon Bonici | St Peter's College (Auckland) | 51.76 |
| 2 | Jack Oliver | Tawa College | 52.88 |
| 3 | Alistair Adams | St Peter's School | 53.28 |
| 4 | Sam Quinn | Westlake Boys High School | 53.85 |
| 5 | Jarrod Jennings | Hamilton Boys High School | 54.01 |
| 6 | Matthew Leahy | St Peter's College (Auckland) | 54.08 |
| 7 | Sam Fitzgerald | Riccarton High School | 55.00 |
| 8 | Dylan Te Maari | Rongotai College | 57.99 |