Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/1998 |  | Baía | DF |  | Leixões SC | Leixões SC |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/1998 | | João de Deus | DF |  | GD Estoril | Estoril |
| 07/1998 | | Luís Ferrinho | DF |  | Casa Pia AC | Casa Pia AC |
| 07/1998 |  | Rui Maside | FW |  | Amora FC | Amora |
Seixal
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/1998 | | Baía | DF | | Leixões SC | Leixões SC |
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/1998 | | João de Deus | DF | | GD Estoril | Estoril |
| 07/1998 | | Luís Ferrinho | DF | | Casa Pia AC | Casa Pia AC |
| 07/1998 | | Rui Maside | FW | | Amora FC | Amora |