| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Brandon Gleaves | Middleton Grange | 59.67q |
| 2 | Maxwell Cooke | St Bede's College | 1:01.71q |
| 3 | Nicholas Hutchinson | Christ's College | 1:01.72q |
| 4 | Luke Hoban | St Bede's College | 1:02.29q |
| 5 | Mark Avery | Burnside High School | 1:03.24q |
| 6 | Campbell Johnston Jennings | Cashmere High School | 1:03.99 |
| -- | Olly Edge | Shirley Boys High School | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Samuel Gilchrist | Christ's College | 1:01.83q |
| 2 | Josh Chronican | Papanui High School | 1:03.47q |
| 3 | Cameron Botica | St Bede's College | 1:03.94 |
| 4 | Jack Fifield | St Andrew's College | 1:04.37 |
| 5 | Stanley Roper | Christchurch Boys High Sc | 1:04.64 |
| 6 | Angus Field | Darfield High School | 1:07.89 |
| 7 | Andrew Storer | St Thomas of Canterbury C | 1:10.52 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Thomas Mohammed | Christ's College | 1:01.49q |
| 2 | Callum King | Cashmere High School | 1:05.52 |
| 3 | Isaac Tull | Riccarton High School | 1:08.30 |
| 4 | Kane Kilbride | Hornby High School | 1:10.54 |
| 5 | Kane White | Hornby High School | 1:11.08 |
| -- | Tom Bailey | St Thomas of Canterbury C | DNS |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Samuel Gilchrist | Christ's College | 58.30 |
| 2 | Brandon Gleaves | Middleton Grange | 58.33 |
| 3 | Nicholas Hutchinson | Christ's College | 59.73 |
| 4 | Thomas Mohammed | Christ's College | 1:00.19 |
| 5 | Maxwell Cooke | St Bede's College | 1:02.04 |
| 6 | Mark Avery | Burnside High School | 1:03.06 |
| 7 | Luke Hoban | St Bede's College | 1:04.01 |
| -- | Josh Chronican | Papanui High School | DNS |