| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Samara Hollows | South Otago High School | 1:00.28q |
| 2 | Jessica Adams | Mackenzie College | 1:02.18q |
| 3 | Sian English | Columba College | 1:05.11q |
| 4 | Annie Stevenson | St Andrew's College | 1:07.20 |
| 5 | Brieana Rawlings | Ashburton College | 1:09.18 |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Philippa Trevella | Rangi Ruru Girls' School | 1:02.94q |
| 2 | Hannah Adamson | Southland Girls' High School | 1:03.86q |
| 3 | Talia Oldham | Otago Girls High School | 1:03.97q |
| 4 | Caitlin Henderson | Timaru Girls' High School | 1:05.45q |
| 5 | Katie Mulholland | Columba College | 1:05.50q |
| 6 | Johanna Leitch | Southland Girls' High School | 1:10.96 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Samara Hollows | South Otago High School | 59.40 |
| 2 | Philippa Trevella | Rangi Ruru Girls' School | 1:00.85 |
| 3 | Jessica Adams | Mackenzie College | 1:01.38 |
| 4 | Hannah Adamson | Southland Girls' High School | 1:01.84 |
| 5 | Talia Oldham | Otago Girls High School | 1:04.15 |
| 6 | Katie Mulholland | Columba College | 1:04.83 |
| 7 | Sian English | Columba College | 1:05.21 |
| 8 | Caitlin Henderson | Timaru Girls' High School | 1:05.26 |