| Final | |||||
| Lane | Comp.No. | Name | AaD | Club | Time |
| 1 | 1 | Isaac Ellis | 18 | Seagulls SC | 32.18 |
| 2 | 2 | Sonny Chamberlain-Hyde | 19 | Seagulls SC | 31.80 |
| 3 | 3 | Oliver Jones | 17 | Poole | 30.69 |
| 4 | 4 | Harry Stewart | 18 | West Dorset | 29.81 |
| 5 | 5 | Martin Littlefair | 29 | Seagulls SC | 30.43 |
| 6 | 6 | Matthew Workman | 18 | Bourmth Coll | 31.47 |
| 7 | 7 | Lawrence Elliott | 17 | Seagulls SC | 31.98 |
| 8 | 8 | Alexander Peaty | 18 | Wareham | 33.11 |