Round 1
| Position | BIB | Name | Team | Echelon | Mark |
|---|---|---|---|---|---|
| 1 | 446 | Guilherme Tavares |
SLB
|
SUB-20 | 04:41.96 (668) |
| 2 | 369 | Gonçalo Alegria |
SCP
|
SUB-20 | 04:42.17 (667) |
| 3 | 358 | Celio Quaresma |
SCP
|
SUB-20 | 04:46.51 (640) |
| 4 | 289 | José Passo |
LAVRA
|
SUB-20 | 04:54.20 (594) |
| DNS | 434 | Bernardo Cunha |
SLB
|
SUB-20 | x |