| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Jake Stamper | Middleton Grange | 2:08.51q |
| 2 | Daniel Franks | Cashmere High School | 2:08.59q |
| 3 | Jozef Knottenbelt | St Bede's College | 2:14.83q |
| 4 | Eugene Campbell | Shirley Boys High School | 2:15.54q |
| 5 | Isaac Ward | St Bede's College | 2:18.02q |
| 6 | Owen Thomas | St Andrew's College | 2:22.87q |
| -- | Josh Kyle | Papanui High School | DNS |
| -- | Masaki Saegusa Princigalli | St Bede's College | DNS |
| -- | Nathaniel Slagter | Combined Country High Sch | DNS |
| -- | Joshua Tansey | St Thomas of Canterbury C | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Joseph Taylor | Christchurch Boys High Sc | 2:05.01q |
| 2 | Derick Lotz | Christchurch Boys High Sc | 2:05.20q |
| 3 | Taylor Hann | Hillmorton High School | 2:09.81q |
| 4 | Sam Chamberlain | Christ's College | 2:10.73 |
| 5 | Tom Turner | Christchurch Boys High Sc | 2:11.95q |
| 6 | George Wigley | Christ's College | 2:12.47q |
| 7 | Karl Hammond | Shirley Boys High School | 2:14.00q |
| 8 | Sean Long | Shirley Boys High School | 2:14.87q |
| 9 | Samuel Hobson | St Andrew's College | 2:15.77q |
| 10 | Dickson Joe | St Thomas of Canterbury C | 2:36.48q |
| 11 | Harry Mao | Riccarton High School | 2:37.81q |
| 12 | Regan Bush | St Thomas of Canterbury C | 2:38.71 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Joseph Taylor | Christchurch Boys High Sc | 2:01.83 |
| 2 | Derick Lotz | Christchurch Boys High Sc | 2:03.01 |
| 3 | Jake Stamper | Middleton Grange | 2:03.56 |
| 4 | Tom Turner | Christchurch Boys High Sc | 2:08.53 |
| 5 | Taylor Hann | Hillmorton High School | 2:08.56 |
| 6 | Sean Long | Shirley Boys High School | 2:12.72 |
| 7 | Daniel Franks | Cashmere High School | 2:14.61 |
| 8 | Samuel Hobson | St Andrew's College | 2:14.88 |
| 9 | Eugene Campbell | Shirley Boys High School | 2:25.49 |
| 10 | Owen Thomas | St Andrew's College | 2:26.13 |
| 11 | Isaac Ward | St Bede's College | 2:27.41 |
| -- | Karl Hammond | Shirley Boys High School | DNS |
| -- | Dickson Joe | St Thomas of Canterbury C | DNS |
| -- | Jozef Knottenbelt | St Bede's College | DNS |
| -- | Harry Mao | Riccarton High School | DNS |
| -- | George Wigley | Christ's College | DNS |