| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Alice Baird | Mackenzie College | 1:13.01q |
| 2 | Megan McPhail | Waitaki Girls' High School | 1:14.80q |
| 3 | Sarah Kerse | Geraldine High School | 1:15.50q |
| 4 | Ysabelle Casey | Roncalli College | 1:16.00q |
| 5 | Charlotte Samson | Ashburton College | 1:20.10 |
| -- | Hayley Davidson | Timaru Girls' High School | DNS |
| -- | Emma Linton | Craighead Diocesen School | DNS |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Cassandra Reid | Craighead Diocesen School | 1:08.10q |
| 2 | Sam McLay | Ashburton College | 1:10.70q |
| 3 | Carter Olivia | Mt Hutt College | 1:10.90q |
| 4 | Kate Cockcroft | Roncalli College | 1:14.30q |
| 5 | Laura Rodgers | Timaru Girls' High School | 1:16.50 |
| -- | Kathy Shears | Waitaki Girls' High School | NT |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Cassandra Reid | Craighead Diocesen School | 1:08.00 |
| 2 | Carter Olivia | Mt Hutt College | 1:11.20 |
| 3 | Alice Baird | Mackenzie College | 1:11.40 |
| 4 | Sam McLay | Ashburton College | 1:11.60 |
| 5 | Kate Cockcroft | Roncalli College | 1:13.00 |
| -- | Ysabelle Casey | Roncalli College | NT |
| -- | Sarah Kerse | Geraldine High School | NT |
| -- | Megan McPhail | Waitaki Girls' High School | NT |