In the run up to the next Portuguese legislative election, various organisations will 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 2025 Portuguese legislative election, held on 18 May, to the present day.

Nationwide polling

Graphical summary

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, 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.

Polling firm/Link Fieldwork date Sample size Turnout LeadPitagórica31 Aug–21 Sep 2026804?24.827.727.46.33.32.41.61.1 5.40.3Aximage14–15 Sep 202650066.821.929.128.66.33.11.70.92.5 5.90.5Pitagórica24 Aug–14 Sep 2026804?25.127.927.36.53.92.01.60.7 5.00.6Intercampus7–14 Sep 2026609?23.427.523.99.94.02.22.82.0 4.03.6Aximage1–7 Sep 20261,10975.720.929.725.47.93.43.01.62.4 5.74.3Pitagórica17 Aug–7 Sep 2026804?24.328.627.66.74.22.31.41.3 3.61.0Pitagórica10–31 Aug 2026804?25.727.927.16.14.02.42.21.3 3.30.8Intercampus10–31 Jul 2026803?22.226.924.48.16.93.03.03.2 2.32.5Aximage22–27 Jul 202680273.625.028.726.27.43.32.31.81.0 4.22.5Aximage20–21 Jul 202650175.023.229.226.47.44.61.81.32.1 4.02.8Intercampus9–14 Jul 2026604 ?22.826.622.18.77.84.72.12.9 2.43.8CESOP–UCP6–10 Jul 2026996?2929218632002TieAximage24–25 Jun 202650073.825.329.323.66.55.81.61.52.2 4.14.0Intercampus10–16 Jun 2026609 ?22.427.923.37.86.53.42.92.6 3.14.6Aximage9–13 Jun 202681773.427.229.525.07.13.01.52.11.6 3.12.3ICS/ISCTE 15–24 May 2026 803 ? 2731 20 3 3 5 2 2 0 74Aximage 18–19 May 2026 505 72.3 23.233.4 23.5 6.3 4.7 2.4 1.3 1.3 3.99.9Intercampus 8–14 May 2026 606 ?25.626.421.67.85.84.04.02.4 2.20.8Aximage 6–7 May 2026 803 72.0 25.131.0 25.0 5.6 3.6 2.1 1.4 2.3 3.95.9Aximage10–15 Apr 202650071.724.330.623.67.05.82.50.81.8 3.76.3Intercampus 8–14 Apr 2026 608 ?23.726.921.98.36.14.53.03.0 2.63.2ICS/ISCTE27 Feb–8 Mar 2026801?2929255242103TieAximage 2–3 Mar 2026 551 73.9 26.627.0 25.8 7.4 4.2 2.7 0.9 1.3 4.10.4Intercampus 6–13 Jan 2026 806 ?26.3 23.4 25.1 9.4 7.6 2.2 1.8 1.3 2.91.2Pitagórica11–19 Dec 20251,000?29.723.122.67.37.32.61.30.5 5.66.6Intercampus 12–16 Dec 2025 611 ?25.6 25.4 23.5 9.1 6.6 3.3 3.1 1.4 2.10.2CESOP–UCP 4–12 Dec 2025 1,185 ?29 23 24 9 6 3 2 <1 0 45Intercampus 14–19 Nov 2025 611 ?26.1 25.2 23.6 8.0 6.5 3.9 1.9 2.5 2.30.9ICS/ISCTE7–17 Nov 2025807?31282443320053Pitagórica5–14 Nov 20251,000?38.526.416.75.35.72.40.70.9 3.412.1Aximage 23–27 Oct 2025 651 73.732.4 23.8 21.9 5.9 6.1 3.2 1.3 2.0 3.48.6Intercampus20–26 Oct 2025 609 ?28.0 25.4 24.4 7.0 5.4 4.0 1.4 3.0 1.42.6 2025 local elections 12 Oct 2025 59.335.6 33.2 11.9 1.6 1.1 5.7 1.0 0.2 0.5 9.22.4Pitagórica6–10 Oct 2025625?34.525.221.93.84.53.31.61.4 3.89.3Aximage2–5 Sep 202557051.425.923.626.86.26.53.12.41.73.80.9Intercampus7–14 Aug 2025611 ?28.9 26.3 22.1 8.1 6.0 1.7 2.8 3.2 1.02.6Intercampus11–18 Jul 2025606 ?26.3 23.6 20.2 7.3 9.9 4.0 2.8 3.3 2.62.7Intercampus5–15 Jun 2025616 ?29.9 21.8 21.7 8.4 7.4 3.4 1.8 3.9 1.88.12025 legislative election 18 May 2025 58.331.8 22.8 22.8 5.4 4.1 2.9 2.0 1.4 0.3 6.59.0

Other scenarios

With "Reconquista" Polling firm/Link Fieldwork date Sample size Turnout R LeadIntercampus10–31 Jul 2026803 ?22.425.420.87.57.43.32.72.7 5.82.03.02025 legislative election 18 May 2025 58.331.8 22.8 22.8 5.4 4.1 2.9 2.0 1.4 0.3 6.59.0

Leadership polls Preferred prime minister 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.

Polling firm/Link Fieldwork date All 3/ LeadPitagórica31 Aug–21 Sep 2026 32.032.719.712.43.10.7Aximage14–15 Sep 2026 19.0 27.127.4 18.0 2.0 7.00.3Pitagórica24 Aug–14 Sep 202632.032.020.812.62.6TieIntercampus 7–14 Sep 2026 25.8 25.428.4 20.42.6Pitagórica17 Aug–7 Sep 2026 3133211232Pitagórica10–31 Aug 2026323221123TieAximage22–27 Jul 2026282726 191Aximage20–21 Jul 202622272419163Intercampus 9–14 Jul 2026 26.030.8 23.5 19.74.8Aximage24–25 Jun 202628272216251Intercampus 10–16 Jun 2026 22.333.8 22.2 21.711.5Aximage 9–13 Jun 2026332824 165Aximage 18–19 May 2026 2427 25 20 1 32Intercampus 8–14 May 2026 27.233.3 20.0 19.56.1Aximage10–15 Apr 202627232220 2 64Intercampus 8–14 Apr 2026 28.529.8 23.0 18.81.3Aximage 2–3 Mar 202631232317258Aximage 23–27 Oct 2025332220192511Aximage2–5 Sep 202528202420174Intercampus11–18 Jul 202543.224.132.719.163.917.718.546.2 Intercampus 5–15 Jun 202556.328.714.927.6

Party leaders' approval/disapproval ratings Poll results showing public opinion on the performance of the leaders of all parties in parliament are shown in the table below in reverse chronological order, showing the most recent first. Polling firm/LinkFieldwork dateLuís MontenegroNuno MeloJosé Luís CarneiroAndré VenturaMariana LeitãoJorge PintoPaulo RaimundoJosé Manuel PurezaInês Sousa RealPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetAximage14–15 Sep 20263160–292452–283747–103755–183048–182745–182252–302052–322846–18Intercampus7–14 Sep 202618.451.7–33.310.748.2–37.521.143.2–22.131.951.7–19.819.236.0–16.88.056.9–48.97.453.1–45.714.848.6–33.8Aximage20–21 Jul 20263261–292747–203944–53657–213046–162848–202054–342153–322946–17Polling firm/LinkFieldwork dateLuís MontenegroNuno MeloJosé Luís CarneiroAndré VenturaMariana LeitãoRui TavaresPaulo RaimundoJosé Manuel PurezaInês Sousa RealPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetIntercampus9–14 Jul 202625.551.0–25.514.642.2–27.622.241.7–19.527.057.7–30.720.538.9–18.424.935.2–10.310.952.9–42.09.648.4–38.815.145.0–29.9Aximage24–25 Jun 20264149–83047–173943–43656–202949–203543–82552–272550–252847–19Intercampus10–16 Jun 202620.651.9–31.38.052.7–44.729.332.1–2.825.957.8–31.915.142.7–27.624.933.0–8.110.549.0–38.510.844.5–33.715.541.2–25.7Intercampus8–14 May 202625.448.4–23.013.545.9–32.426.529.2–2.722.862.7–39.917.838.5–20.726.434.0–7.612.151.2–39.19.047.3–38.313.446.4–33.0Intercampus8–14 Apr 202625.747.9–22.29.753.1–43.423.237.1–13.925.060.4–35.414.342.6–28.325.038.4–13.49.952.6–42.710.849.5–38.713.348.0–34.7Aximage2–3 Mar 20264446–22844–163840–23260–282646–203241–92052–361946–272644–18Intercampus12–16 Dec 202525.544.8–19.313.443.2–29.825.236.7–11.532.051.2–19.220.837.1–16.325.933.7–7.813.151.9–38.811.147.3–36.214.742.2–27.5Polling firm/LinkFieldwork dateLuís MontenegroNuno MeloJosé Luís CarneiroAndré VenturaMariana LeitãoRui TavaresPaulo RaimundoMariana MortáguaInês Sousa RealPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetIntercampus14–19 Nov 202535.038.7–3.712.944.9–32.022.431.9–9.529.555.3–25.817.437.2–19.826.036.3–10.313.451.4–38.010.663.8–53.212.047.5–35.5Aximage23–27 Oct 20254940+93248–164240+23360–273245–133642–62159–381968–493045–15Intercampus20–26 Oct 202530.236.5–6.315.243.5–28.323.835.3–11.524.957.4–32.522.135.3–13.225.435.8–10.48.250.0–41.810.364.9–54.614.844.0–29.2Aximage2–5 Sep 20254051–113045–153445–114050–102946–173341–82154–332559–343044–14Intercampus7–14 Aug 202535.637.6–2.010.344.0–33.722.532.4–9.929.749.7–20.016.133.0–16.928.629.3–0.711.549.6–38.113.158.1–45.017.040.7–23.7Intercampus11–18 Jul 202534.335.5–1.216.045.0–29.026.128.1–2.025.657.5–31.915.734.3–18.629.031.5–2.510.157.0–46.912.460.4–48.012.444.6–32.2Polling firm/LinkFieldwork dateLuís MontenegroNuno MeloPedro Nuno SantosAndré VenturaRui RochaRui TavaresPaulo RaimundoMariana MortáguaInês Sousa RealPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetPos.Neg.NetIntercampus5–15 Jun 202535.236.0–0.812.542.7–30.214.359.4–45.122.758.9–36.226.132.6–6.528.930.4–1.59.354.5–45.210.363.0–52.713.842.1–28.3

Party leaders' ratings Poll results showing the public opinion on all political party leaders rated from 0 to 10 (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).

Polling firm/Link Fieldwork date LeadIntercampus 7–14 Sep 2026 4.8 4.8 5.4 5.2 5.4 5.2 4.4 4.4 4.8 TieIntercampus 9–14 Jul 2026 5.2 5.0 5.4 4.8 5.45.6 4.6 4.6 5.0 0.2CESOP–UCP 6–10 Jul 20265.1 4.2 4.9 3.8 4.3 4.7 3.8 3.7 3.6 4.00.2Intercampus 10–16 Jun 2026 5.0 4.6 5.8 4.6 5.25.8 4.8 4.8 5.2 TieICS/ISCTE 15–24 May 2026 4.6 3.3 4.7 3.6 3.7 3.9 3.4 3.6 3.6 3.40.1Intercampus 8–14 May 2026 5.2 5.0 5.8 4.4 5.4 5.6 4.8 4.8 5.0 0.2Intercampus 8–14 Apr 2026 5.2 4.6 5.6 4.6 5.25.6 4.6 4.6 4.6 TieICS/ISCTE 27 Feb–8 Mar 20265.2 3.9 5.0 3.9 4.1 4.2 3.4 3.9 3.6 4.20.2Intercampus 12–16 Dec 2025 5.4 5.0 5.6 5.2 5.45.8 4.8 4.8 5.0 0.2Intercampus 14–19 Nov 20255.8 5.0 5.8 4.8 5.4 5.6 4.8 4.2 5.0 TieIntercampus20–26 Oct 20255.8 5.2 5.6 4.8 5.6 5.6 4.8 4.2 5.2 0.2Intercampus7–14 Aug 20255.8 5.0 5.6 5.2 5.45.8 4.8 4.6 5.2 Tie Intercampus 11–18 Jul 20255.8 5.0 5.8 4.8 5.45.8 4.6 4.4 5.0 Tie Intercampus 5–15 Jun 20255.8 5.0 4.6 4.6 5.6 5.8 4.6 4.2 5.0 Tie

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.

Polling firm/Link Fieldwork date Sample size Luís Montenegro's cabinet Approve Disapprove Neither No opinion LeadPitagórica31 Aug–21 Sep 20268043460 626Aximage14–15 Sep 20265002767 640Intercampus 7–14 Sep 2026 609 14.1 55.2 29.4 1.325.8Pitagórica24 Aug–14 Sep 20268043559 624Pitagórica17 Aug–7 Sep 20268043559 624Pitagórica10–31 Aug 20268043558 723Aximage20–21 Jul 20265012768 541GfK Metris 13–20 Jul 2026 80040 36 21 24Intercampus 9–14 Jul 2026 604 22.2 52.0 24.7 1.227.3CESOP–UCP6–10 Jul 2026996 11 4146 25Aximage24–25 Jun 2026 500 39 56 617Intercampus 10–16 Jun 2026 609 17.9 52.4 28.2 1.524.2ICS/ISCTE 15–24 May 2026 803 27.6 61.1 11.333.5Aximage 18–19 May 2026505 33 58 925Intercampus 8–14 May 2026 606 23.2 47.8 26.7 2.321.1Aximage 6–7 May 2026 803 40 53 813Aximage10–15 Apr 2026500 41 54 613Intercampus 8–14 Apr 2026 608 19.2 51.9 26.8 2.025.1ICS/ISCTE27 Feb–8 Mar 2026801 35 56 921Aximage2–3 Mar 2026551 42 51 79Intercampus12–16 Dec 2025611 22.2 45.9 30.4 1.515.5CESOP–UCP 4–12 Dec 2025 1,185 17 3249 217Intercampus14–19 Nov 2025611 26.4 40.5 31.8 1.38.7Aximage 23–27 Oct 2025 65149 43 86Intercampus20–26 Oct 2025609 27.3 41.6 30.4 0.711.2Aximage2–5 Sep 2025 570 31 59 1028Intercampus7–14 Aug 2025611 25.7 39.4 32.7 2.26.7 Intercampus 11–18 Jul 2025 606 26.2 39.6 32.7 1.56.9

See also List of heads of the executive by approval rating

Notes

References

External links Marktest Opinion Poll Tracker ERC - Official publication of polls Average of polls and seat simulator