| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Joe Davis | Linwood College | 1:00.11q |
| 2 | Julian Lagan | St Bede's College | 1:02.61q |
| 3 | Will Angland | Christ's College | 1:02.78q |
| 4 | Salman Ahmed | Shirley Boys High School | 1:07.35 |
| 5 | Ben Masara | Mairehau High School | 1:09.82 |
| 6 | Edward Williams | Christchurch Boys High Sc | 1:10.38 |
| 7 | Angus McConnell | Kaiapoi High School | 1:10.59 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Mitchell Egan | St Andrew's College | 1:02.57q |
| 2 | Ryan Price | Hornby High School | 1:05.79 |
| 3 | Jaega Banga | Burnside High School | 1:08.33 |
| 4 | Cameron Cowie | St Thomas of Canterbury C | 1:11.36 |
| 5 | Jamie Bradford | Cathedral College | 1:11.69 |
| -- | Matthew Brorens | Papanui High School | DNS |
| -- | Piriwata Witute | Shirley Boys High School | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Thomas Martin | St Bede's College | 56.05q |
| 2 | Connor Tyndall | Cashmere High School | 1:00.62q |
| 3 | Ben Leggat | Christ's College | 1:01.90q |
| 4 | Samuel Howes | St Andrew's College | 1:03.79 |
| 5 | Eric Oosterhuis | Christchurch Boys High Sc | 1:07.50 |
| 6 | Hayden McCarthy | St Thomas of Canterbury C | 1:08.35 |
| 7 | Uale Peneli | Aranui High School | 1:10.06 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Peter Withers | St Andrew's College | 1:02.04q |
| 2 | Glenn Smith | Combined Country High Sch | 1:03.77 |
| 3 | James Jackson | Burnside High School | 1:03.91 |
| 4 | Conor Houghton | St Bede's College | 1:07.16 |
| 5 | Jacob Fairhall | Kaiapoi High School | 1:13.33 |
| 6 | Brian Davis | Aranui High School | 1:14.32 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Thomas Martin | St Bede's College | 54.47 |
| 2 | Connor Tyndall | Cashmere High School | 58.40 |
| 3 | Will Angland | Christ's College | 59.12 |
| 4 | Ben Leggat | Christ's College | 59.26 |
| 5 | Joe Davis | Linwood College | 59.43 |
| 6 | Peter Withers | St Andrew's College | 59.64 |
| 7 | Mitchell Egan | St Andrew's College | 1:01.73 |
| 8 | Julian Lagan | St Bede's College | 1:06.58 |