Opinion polling for the next Portuguese legislative election

In the run up to the next Portuguese legislative election, various organisations carry out opinion polling to gauge voting intention in Portugal. Results of such polls are displayed in this article.
The date range for these opinion polls are from the previous legislative election, held on 6 October 2019, to the present day.
Nationwide polling.
Polling.
Poll results are listed in the table below in reverse chronological order, showing the most recent first. The highest percentage figure in each polling survey is displayed in bold, and the background shaded in the leading party's colour. In the instance that there is a tie, then no figure is shaded but both are displayed in bold. The lead column on the right shows the percentage-point difference between the two parties with the highest figures. Poll results use the date the survey's fieldwork was done, as opposed to the date of publication.
Leadership polls.
Preferred Prime Minister.
Poll results showing public opinion on who would make the best Prime Minister are shown in the table below in reverse chronological order, showing the most recent first.
Cabinet approval/disapproval ratings.
Poll results showing public opinion on the performance of the Government are shown in the table below in reverse chronological order, showing the most recent first.