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.