| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Michael Borthwick | Christ's College | 58.62q |
| 2 | Ben Lilley | St Bede's College | 1:02.06 |
| 3 | Martin Westley | Burnside High School | 1:05.52 |
| 4 | Cody Kentish | Aranui High School | 1:17.24 |
| -- | Joe Davies | Linwood College | DNS |
| -- | Dominic Lloyd | Shirley Boys High School | DNSq |
| -- | Simi Patelo | Aranui High School | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | DJ Kilden | Christchurch Boys High Sc | 56.91q |
| 2 | Conor Houghton | St Bede's College | 58.65 |
| 3 | Denis Milkin | Shirley Boys High School | 58.92q |
| 4 | Ben Leggat | Christ's College | 59.92q |
| 5 | Will Angland | Christ's College | 1:01.55q |
| 6 | Sid Joy | Burnside High School | 1:07.22 |
| -- | Devan Eden | Papanui High School | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Thomas Martin | St Bede's College | 55.09q |
| 2 | Ashley Cox | St Andrew's College | 1:01.03q |
| 3 | Nigel Gibb | Rangiora High School | 1:03.95 |
| 4 | Ollie Hunt | Christchurch Boys High Sc | 1:07.40 |
| 5 | Joe Stanley | St Thomas of Canterbury C | 1:08.33 |
| 6 | Callum Scully | Middleton Grange | 1:14.44 |
| -- | Matt Baker | Shirley Boys High School | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Thomas Martin | St Bede's College | 51.93 |
| 2 | DJ Kilden | Christchurch Boys High Sc | 55.12 |
| 3 | Ben Leggat | Christ's College | 56.89 |
| 4 | Denis Milkin | Shirley Boys High School | 56.97 |
| 5 | Michael Borthwick | Christ's College | 57.51 |
| 6 | Ashley Cox | St Andrew's College | 58.57 |
| 7 | Will Angland | Christ's College | 1:00.19 |
| 8 | Dominic Lloyd | Shirley Boys High School | 1:01.56 |