| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Sam Briggs | St Andrew's College | 54.38q |
| 2 | Hamish O'Connell | Christchurch Boys High Sc | 55.08q |
| 3 | Hamish Upton | Burnside High School | 56.76 |
| 4 | John Mokomoko | Lincoln High School | 59.00 |
| 5 | Vulaono Korovavala | Mairehau High School | 59.82 |
| -- | Daniel Hodges | Shirley Boys High School | DNS |
| -- | Bradley Murchison | Christ's College | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Joel Armstrong | Middleton Grange | 52.93q |
| 2 | Jasper Kelly | Christ's College | 53.31q |
| 3 | Cameron Mitchell | St Andrew's College | 54.30q |
| 4 | Sam Vesey | Christchurch Boys High Sc | 56.30 |
| 5 | Paul Tusa | Cathedral College | 57.54 |
| 6 | Clint Dwyer | Lincoln High School | 1:00.81 |
| -- | Jason Sinclair | Shirley Boys High School | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Hamish McCormick | Burnside High School | 53.59q |
| 2 | Darragh Kenny | St Bede's College | 53.79q |
| 3 | Jamie Pottinger | Christchurch Boys High Sc | 53.85q |
| 4 | Vinimoa Letiu | Cathedral College | 1:03.69 |
| 5 | Heath Weir | Riccarton High School | 1:07.82 |
| -- | Ben Bellamy | St Andrew's College | DNS |
| -- | Siologa Leota | St Thomas of Canterbury C | DNF |
| -- | Peter Stockdale | Aranui High School | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Joel Armstrong | Middleton Grange | 50.06 |
| 2 | Jasper Kelly | Christ's College | 52.55 |
| 3 | Hamish McCormick | Burnside High School | 53.10 |
| 4 | Sam Briggs | St Andrew's College | 53.55 |
| 5 | Cameron Mitchell | St Andrew's College | 53.85 |
| 6 | Hamish O'Connell | Christchurch Boys High Sc | 53.93 |
| 7 | Jamie Pottinger | Christchurch Boys High Sc | 54.56 |
| 8 | Darragh Kenny | St Bede's College | 55.65 |