| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Charles Porter | Christ's College | 1:00.49q |
| 2 | Dylan Cox | Christchurch Boys High Sc | 1:07.37q |
| 3 | Adam Prest | Burnside High School | 1:09.13q |
| 4 | Joseph Weir | Hornby High School | 1:14.11 |
| 5 | Harry Graham-Samson | Lincoln High School | 1:20.75 |
| -- | Chris Tomlinson | St Andrew's College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Francis Donaldson | St Bede's College | 1:00.42q |
| 2 | Nick Rapana | Papanui High School | 1:02.84q |
| 3 | Joseph Maea | Hornby High School | 1:05.00q |
| 4 | Prateek Atwal | Lincoln High School | 1:06.72q |
| -- | Sean Buijs | Shirley Boys High School | DNS |
| -- | Ben Laughton | St Thomas of Canterbury C | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Dale Smith | St Thomas of Canterbury C | 1:05.91q |
| 2 | Tim Smit | Rangiora High School | 1:09.88 |
| 3 | Chris Haxell | Lincoln High School | 1:14.72 |
| -- | Sam Fleming | Christchurch Boys High Sc | DNS |
| -- | Alexander Fort | Shirley Boys High School | DNS |
| -- | Alistair McIntyre | Riccarton High School | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Francis Donaldson | St Bede's College | 58.02 |
| 2 | Charles Porter | Christ's College | 59.24 |
| 3 | Nick Rapana | Papanui High School | 1:00.78 |
| 4 | Joseph Maea | Hornby High School | 1:02.00 |
| 5 | Prateek Atwal | Lincoln High School | 1:02.93 |
| 6 | Dylan Cox | Christchurch Boys High Sc | 1:03.00 |
| 7 | Dale Smith | St Thomas of Canterbury C | 1:03.35 |
| 8 | Adam Prest | Burnside High School | 1:04.22 |