| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Millie Long | 16 | S Bournem'th | 38.49 |
| 2 | 2 | Tilly McHugh | 16 | Poole | 38.19 |
| 3 | 3 | Grace Chaffey | 16 | West Dorset | 37.69 |
| 4 | 4 | Betsy Vavasour | 16 | Poole | 36.37 |
| 5 | 5 | Holly Chandler | 16 | Wareham | 37.57 |
| 6 | 6 | Orla Whittaker | 16 | Seagulls SC | 37.83 |
| 7 | 7 | Amelia Chaffey | 16 | West Dorset | 38.40 |
| 8 | 8 | Josie Hopkins | 16 | N Dorset SC | 38.77 |