This is a list of Portuguese football transfers for the 2020–21 winter transfer window.
The winter transfer window will open 1 January 2021, although a few transfers may take place prior to that date.
The window closes at midnight on 1 February 2021 although outgoing transfers might still happen to leagues in which the window is still open.
Only moves involving Primeira Liga clubs are listed.
Additionally, players without a club may join a club at any time.