| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Maggie Jones | Whanganui High School | 44.97q |
| 2 | Sarah Langsbury | St Hilda's Collegiate | 47.70q |
| 3 | Ava Duggan | Rosehill College | 49.05q |
| 4 | Madelin Herbert | Napier Girls High School | 50.07 |
| 5 | Katherine Winter | Wellington Girls' College | 52.04 |
| 6 | Ruby Sinclair | Whanganui Collegiate | 52.93 |
| 7 | Theresa Lober-Chan | St Mary's College (Auckland) | 53.64 |
| -- | Samadiana Fariz | Macleans College | DQ |
| Placing | Athlete | Team | Preliminaries |
|---|---|---|---|
| 1 | Genna Maples | Whanganui Collegiate | 44.86q |
| 2 | Julia Burnham | Villa Maria College | 46.02q |
| 3 | Alicia O'Connor | Hillcrest High School | 46.94q |
| 4 | Casie Glentworth | Whanganui High School | 47.36q |
| 5 | Lucy Elliott | New Plymouth Girls High School | 48.67q |
| 6 | Grace Walford | Whanganui High School | 50.32 |
| 7 | Grace Thomson | Burnside High School | 52.66 |
| 8 | Emily Hall | Otago Girls High School | 56.24 |
| Placing | Athlete | Team | Finals |
|---|---|---|---|
| 1 | Maggie Jones | Whanganui High School | 44.71 |
| 2 | Alicia O'Connor | Hillcrest High School | 45.86 |
| 3 | Sarah Langsbury | St Hilda's Collegiate | 46.44 |
| 4 | Julia Burnham | Villa Maria College | 47.48 |
| 5 | Casie Glentworth | Whanganui High School | 47.77 |
| 6 | Lucy Elliott | New Plymouth Girls High School | 47.90 |
| 7 | Ava Duggan | Rosehill College | 48.02 |
| -- | Genna Maples | Whanganui Collegiate | SCR |