| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Olly Parkinson | Auckland Grammar School | 54.03q |
| 2 | Caleb Van Essen | Rangitoto College | 54.42q |
| 3 | Zinan Bennett | Middleton Grange School | 55.06q |
| 4 | Sam Isbister | Wellington College | 56.96 |
| 5 | Theo Collett | Wairarapa College | 57.07 |
| 6 | Hamish Cathcart | St Patricks College Silverstr | 57.49 |
| 7 | Ioane Opuu | Cook Islands | 1:01.66 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Louis Andrews | St Thomas of Canterbury Colleg | 53.41q |
| 2 | Matthew Palmer | Sacred Heart College Auck | 54.45q |
| 3 | Mattheus Pio | Hamilton Boys High School | 54.61q |
| 4 | Joseph Watts | Auckland Grammar School | 56.57q |
| 5 | Max Ngataki | Shirley Boys High School | 57.89 |
| 6 | Aydan Goldby | Hauraki Plains College | 58.18 |
| -- | Jack Addis | Kings High School | DQ |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Sam Gouverneur | Kings High School | 52.91q |
| 2 | Michael Graham | Sacred Heart College Auck | 53.96q |
| 3 | Cameron Marino | Shirley Boys High School | 56.05q |
| 4 | Brad Austin | Christchurch Boys High School | 56.38q |
| 5 | Hamuera Kereopa | Otago Boys High School | 56.82q |
| 6 | Carlos Heather | Cook Islands | 57.36 |
| 7 | Hamish Ross | St John College | 1:01.45 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Mikael Starzynski | Wairarapa College | 52.95q |
| 2 | Judd Cargin | Burnside High School | 53.88q |
| 3 | Johnny Baker | John McGlashan College | 54.42q |
| 4 | James Hellriegel | Mt Albert Grammar | 56.72q |
| 5 | Tim Meynell | Riccarton High School | 57.70 |
| 6 | Sean Hewett | St Patricks College Silverstr | 59.89 |
| -- | Jahream Bula | Avondale College | DNS |
| -- | Thomas Fletcher | Waimate High School | DNS |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Sam Gouverneur | Kings High School | 54.20q |
| 2 | Olly Parkinson | Auckland Grammar School | 54.62q |
| 3 | Judd Cargin | Burnside High School | 54.84q |
| 4 | Matthew Palmer | Sacred Heart College Auck | 54.91q |
| 5 | Johnny Baker | John McGlashan College | 56.79q |
| 6 | Hamuera Kereopa | Otago Boys High School | 58.43 |
| 7 | Cameron Marino | Shirley Boys High School | 59.29 |
| 8 | Brad Austin | Christchurch Boys High School | 59.88 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Mikael Starzynski | Wairarapa College | 54.82q |
| 2 | Michael Graham | Sacred Heart College Auck | 55.92q |
| 3 | Louis Andrews | St Thomas of Canterbury Colleg | 56.51q |
| 4 | Caleb Van Essen | Rangitoto College | 57.03 |
| 5 | Zinan Bennett | Middleton Grange School | 57.60 |
| 6 | James Hellriegel | Mt Albert Grammar | 1:01.16 |
| -- | Mattheus Pio | Hamilton Boys High School | DQ |
| -- | Joseph Watts | Auckland Grammar School | DQ |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Mikael Starzynski | Wairarapa College | 51.91 |
| 2 | Sam Gouverneur | Kings High School | 51.94 |
| 3 | Matthew Palmer | Sacred Heart College Auck | 52.35 |
| 4 | Michael Graham | Sacred Heart College Auck | 53.28 |
| 5 | Louis Andrews | St Thomas of Canterbury Colleg | 54.20 |
| 6 | Johnny Baker | John McGlashan College | 55.65 |
| 7 | Judd Cargin | Burnside High School | 1:00.63 |
| -- | Olly Parkinson | Auckland Grammar School | F |