| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| -- | Ryan Ammar | Timaru Boys' High School | q |
| -- | Ryan Cone | Ashburton College | q |
| -- | James McFarlane | Timaru Boys' High School | q |
| -- | Damian Needham | Waitaki Boys' High School | q |
| -- | Tomi Obafemi | Ashburton College | q |
| -- | Fraser Proctor | Geraldine High School | q |
| -- | Dan Sheat | Waitaki Boys' High School | q |
| -- | Tony Wood | Waimate High School | q |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Tomi Obafemi | Ashburton College | 58.40 |
| 2 | Ryan Ammar | Timaru Boys' High School | 59.60 |
| 3 | Tony Wood | Waimate High School | 1:00.07 |
| -- | Ryan Cone | Ashburton College | NT |
| -- | James McFarlane | Timaru Boys' High School | NT |
| -- | Damian Needham | Waitaki Boys' High School | NT |
| -- | Fraser Proctor | Geraldine High School | NT |
| -- | Dan Sheat | Waitaki Boys' High School | NT |