| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Frazer Wickes | Westlake Boys High School | 54.75q |
| 2 | Alex Wells-Green | Kristin School | 56.77q |
| 3 | Cameron Ward | Westlake Boys High School | 58.15q |
| 4 | Finn Dempsey | Mahurangi College | 58.49q |
| 5 | James Stott | Long Bay College | 58.67 |
| 6 | Von Juinio | Glenfield College | 1:12.55 |
| -- | Dayne Pomare | Whangaparaoa College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | David Fransen | Orewa College | 55.43q |
| 2 | Ben Paltridge | Kristin School | 57.86q |
| 3 | Russell Cooper | Orewa College | 58.51q |
| 4 | Hendrik van Wyk | Long Bay College | 59.31 |
| 5 | Josh Mweendo | Westlake Boys High School | 1:01.10 |
| -- | Gideon van Zyl | Wentworth College | DNS |
| -- | Harley Xiao | Glenfield College | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Frazer Wickes | Westlake Boys High School | 53.72 |
| 2 | Ben Paltridge | Kristin School | 54.87 |
| 3 | David Fransen | Orewa College | 55.09 |
| 4 | Alex Wells-Green | Kristin School | 55.25 |
| 5 | Cameron Ward | Westlake Boys High School | 58.13 |
| 6 | Russell Cooper | Orewa College | 1:00.67 |
| 7 | Finn Dempsey | Mahurangi College | 1:02.95 |