| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Renaye Flocton | Columba College | 1:01.99q |
| 2 | Alice Sharples | Rangi Ruru Girls' School | 1:02.57q |
| 3 | Bailey Kennedy | St Margaret's College | 1:03.18q |
| 4 | Megan Turner | East Otago High School | 1:08.24q |
| 5 | Alice Baird | Mackenzie College | 1:09.98 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Cassandra Reid | Craighead Diocesan School | 1:01.46q |
| 2 | Jessica O'Halloran | St Margaret's College | 1:01.51q |
| 3 | Maicalia Steinegg | Burnside High School | 1:01.53q |
| 4 | Caitlin O'Brien | St Hilda's Collegiate | 1:01.68q |
| 5 | Sam McLay | Ashburton College | 1:08.68 |
| -- | Anna Tempero | Marlborough Girls College | DQ |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Alice Sharples | Rangi Ruru Girls' School | 59.78 |
| 2 | Renaye Flocton | Columba College | 1:00.03 |
| 3 | Cassandra Reid | Craighead Diocesan School | 1:00.09 |
| 4 | Maicalia Steinegg | Burnside High School | 1:01.67 |
| 5 | Jessica O'Halloran | St Margaret's College | 1:01.87 |
| 6 | Caitlin O'Brien | St Hilda's Collegiate | 1:02.06 |
| 7 | Bailey Kennedy | St Margaret's College | 1:02.92 |
| 8 | Megan Turner | East Otago High School | 1:08.99 |