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, parties are shaded with their colour. 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.
Polls that show their results without distributing those respondents who are undecided or said they would abstain from voting, are re-calculated by removing these numbers from the totals through a simple rule of three, in order to obtain results comparable to other polls and the official election results.
Poll results showing public opinion on who would make the best prime minister or who is better positioned to win are shown in the table below in reverse chronological order, showing the most recent first.
Poll results showing the public opinion on all political party leaders rated from 0 to 10[j] (with the former being strong disapproval and the latter strong approval) are shown in the table below in reverse chronological order (showing the most recent first).
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.
^ Results presented here exclude undecideds (9.8%). With their inclusion results are: PS: 27.1%; AD: 26.0%; CHEGA: 14.6%; IL: 7.5%; BE: 5.2%; CDU: 3.0%; Livre: 3.0%; PAN: 2.9%; Others/Invalid: 0.9%.
^ Results presented here exclude undecideds (6.9%). With their inclusion results are: AD: 26.2%; PS: 24.9%; CHEGA: 19.5%; IL: 5.6%; Livre: 4.0%; CDU: 3.4%; BE: 3.1%; PAN: 1.5%; Others/Invalid: 5.0%.
^ Results presented here exclude undecideds (13.6%). With their inclusion results are: PS: 25.5%; AD: 24.3%; CHEGA: 12.2%; IL: 6.5%; BE: 5.2%; CDU: 3.3%; Livre: 3.0%; PAN: 1.7%; Others/Invalid: 4.6%.
^ Results presented here exclude undecideds (9.9%). With their inclusion results are: PS: 28.4%; AD: 26.6%; CHEGA: 13.3%; IL: 7.4%; BE: 5.7%; CDU: 3.2%; Livre: 2.7%; PAN: 1.2%; Others/Invalid: 1.6%.
^ Results presented here exclude undecideds (8.1%). With their inclusion results are: AD: 26.4%; PS: 23.9%; CHEGA: 14.3%; IL: 9.0%; BE: 5.8%; Livre: 4.9%; PAN: 3.3%; CDU: 2.2%; Others/Invalid: 2.2%.
^ Results presented here exclude undecideds (9.2%). With their inclusion results are: AD: 26.8%; PS: 24.6%; CHEGA: 14.6%; IL: 8.5%; BE: 6.5%; Livre: 5.0%; PAN: 2.8%; CDU: 1.6%; Others/Invalid: 0.6%.
^ Results presented here exclude undecideds (6.3%). With their inclusion results are: PS: 23.1%; AD: 22.2%; CHEGA: 16.3%; Livre: 8.8%; IL: 8.4%; BE: 7.7%; PAN: 3.0%; CDU: 2.3%; Others/Invalid: 1.8%.
^ Results presented here exclude undecideds (7.4%). With their inclusion results are: PS: 26.6%; AD: 22.5%; CHEGA: 14.4%; BE: 9.0%; IL: 7.3%; Livre: 5.3%; PAN: 2.7%; CDU: 2.1%; Others/Invalid: 2.7%.
^ Question: Who do you think has more competency to be the prime minister of Portugal, the current prime minister Luís Montenegro or Pedro Nuno Santos?
^Intercampus and Aximage polls rate party leaders from 1 to 5. CESOP–UCP poll rates party leaders from 0 to 20. The results are adapted to match the ICS/ISCTE polls.