| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Noah Hemi | Sacred Heart College Auck | 52.82q |
| 2 | Nathan Pike | Tauranga Boys College | 53.93q |
| 3 | Jack Gordon | St Paul's Collegiate Ham | 54.09q |
| 4 | Oliver O'Leary | Wanganui Collegiate | 55.29q |
| 5 | Judd Cargin | Burnside High School | 55.36q |
| 6 | Oliver Aikman-Nordon | Scots College | 57.61 |
| 7 | Ashley Shen | Te Awamutu College | 59.84 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Oliver Miller | St Peter's College Auckland | 52.40q |
| 2 | Joshua Nairne | St Patricks College Kilbirnie | 52.58q |
| 3 | Ryan Wilkins | St Paul's Collegiate Ham | 53.02q |
| 4 | Olly Parkinson | Auckland Grammar School | 53.23q |
| 5 | Cameron Keeys | Paeroa College | 54.17q |
| 6 | Bailey Gebbie | Timaru Boy's High School | 58.41 |
| 7 | Sean Hewett | St Patricks College Silverstr | 58.66 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jimmy-James Duncan | Wanganui Collegiate | 53.98q |
| 2 | Ben Murdoch | Newlands College | 54.33q |
| 3 | Sam Hill | Lindisfarne College | 55.10q |
| 4 | Shaun Skilling | Burnside High School | 55.57q |
| 5 | James Knott | Wellington College | 56.04q |
| 6 | Joshua Heatlie | Kristin School | 57.81 |
| 7 | Ben (George) Moore | Rangitoto College | 1:01.57 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Cameron McCully | Timaru Boy's High School | 53.76q |
| 2 | Cameron James | Nayland College | 54.57 |
| 3 | Tom Mackisack | Lindisfarne College | 54.96q |
| 4 | Jayden Wall | Christchurch Boys High School | 55.97q |
| 5 | Conrad Taafuli | Rongotai College | 56.36q |
| 6 | Joseph Watts | Auckland Grammar School | 58.03 |
| 7 | Brad Brunton | St John College | 58.10 |
| 8 | Hamish Cathcart | St Patricks College Silverstr | 59.97 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Conor McGiven | St Peter's School Camb | 52.46q |
| 2 | Brett Hooper | Palmerston North Boys High Sch | 53.76q |
| 3 | Dylan Bartholomew | St Kentigern College | 56.03q |
| 4 | Rory Sutherland | Kristin School | 56.75q |
| 5 | Isaac Athfield | Wellington College | 58.00 |
| 6 | Jared Smith | Rongotai College | 1:01.30 |
| -- | Alex Winship | St Patricks College Silverstr | DQ |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Noah Hemi | Sacred Heart College Auck | 52.65q |
| 2 | Cameron McCully | Timaru Boy's High School | 53.36q |
| 3 | Ben Murdoch | Newlands College | 54.57 |
| 4 | Olly Parkinson | Auckland Grammar School | 54.94 |
| 5 | James Knott | Wellington College | 55.84 |
| 6 | Dylan Bartholomew | St Kentigern College | 56.01 |
| 7 | Jayden Wall | Christchurch Boys High School | 56.38 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Conor McGiven | St Peter's School Camb | 52.73q |
| 2 | Ryan Wilkins | St Paul's Collegiate Ham | 53.11q |
| 3 | Nathan Pike | Tauranga Boys College | 53.67q |
| 4 | Sam Hill | Lindisfarne College | 54.23 |
| 5 | Jimmy-James Duncan | Wanganui Collegiate | 54.26 |
| 6 | Shaun Skilling | Burnside High School | 54.60 |
| 7 | Cameron Keeys | Paeroa College | 56.90 |
| 8 | Conrad Taafuli | Rongotai College | 57.28 |
| Placing | Athlete | Team | Semi Finals |
|---|---|---|---|
| 1 | Oliver Miller | St Peter's College Auckland | 52.31q |
| 2 | Joshua Nairne | St Patricks College Kilbirnie | 52.95q |
| 3 | Brett Hooper | Palmerston North Boys High Sch | 53.86q |
| 4 | Jack Gordon | St Paul's Collegiate Ham | 54.57 |
| 5 | Tom Mackisack | Lindisfarne College | 54.93 |
| 6 | Judd Cargin | Burnside High School | 55.66 |
| 7 | Oliver O'Leary | Wanganui Collegiate | 57.39 |
| 8 | Rory Sutherland | Kristin School | 1:01.88 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Oliver Miller | St Peter's College Auckland | 50.24 |
| 2 | Cameron McCully | Timaru Boy's High School | 51.70 |
| 3 | Conor McGiven | St Peter's School Camb | 51.93 |
| 4 | Joshua Nairne | St Patricks College Kilbirnie | 52.13 |
| 5 | Noah Hemi | Sacred Heart College Auck | 52.58 |
| 6 | Brett Hooper | Palmerston North Boys High Sch | 52.86 |
| 7 | Ryan Wilkins | St Paul's Collegiate Ham | 53.53 |
| 8 | Nathan Pike | Tauranga Boys College | 55.75 |