29 January – The government announces that the descendents of Sephardic Jews who were expelled, killed, or suffered forced conversion to Christianity at the end of the 15th century will be able to apply for Portuguese citizenship.[4]
27 February – Data from the Instituto Nacional de Estatística reveals that the national economy grew by 0.9% in 2014, marking the country's first full-year of economic expansion since 2010. The forecast shows further expected growth of 1.5% for 2015.[5]
18 March – The head of the tax revenue service Antonio Brigas Afonso resigns following claims his office attempted to hide the tax records of top officials, including Prime Minister Pedro Passos Coelho, from investigators.[7]
24 March – Palaeontologists announce that the fossils of a 220-million year old carnivorous amphibian found in the Algarve constitute a new species, named Metoposaurus algarvensis. The species is thought to have been one of the top predators in the late Triassic.[8]
17 May – In association football, S.L. Benfica win the 2014–15 Primeira Liga following a 0–0 draw against Vitória Guimarães, securing an unassailable points lead ahead of title rivals F.C. Porto with one game of the season left to play. It is the first time the club has won back-to-back league championships in more than three decades.[10]
31 May – The SATUOeiras unmanned light rail service in the city of Oeiras, the first of its kind in the country, is terminated after eleven years of operation due to rising debts of €40 million and uncertainties over its long-term future.[12]
11 June – The government sells its controlling stake in the national flag carrierTAP Air Portugal to a consortium headed by Brazilian-American businessman David Neeleman for €10 million. The sale is met with a mixed response: Prime Minister Pedro Passos Coelho praises the end a process attempted by governments for almost two decades, while the Socialist Party announces its intention to re-nationalise the airline upon victory in autumn's general election.[13]
23 July – MPs approve plans to strengthen anti-abortion laws, which include the introduction of fees and mandatory counselling sessions for those wishing to end pregnancies early.[16]
9 August – In cycling, Spain's Gustavo Veloso wins the 2015 Volta a Portugal in a time of 40 hours and 39 seconds. It is Veloso's second consecutive win in the event.[17]
3 September – Following months of below-average rainfall, a report by the Portuguese Institute for Sea and Atmosphere states that the country is suffering its second worst drought in 70 years, with almost three-quarters of the country experiencing severe or extreme drought conditions.[18]
The Portugal à Frente coalition of the PSD and CDS–PP parties under Prime Minister Pedro Passos Coelho finishes as the largest group in the Assembly with 107 seats and 36.8% of the vote, but falls short of securing an absolute majority. The Socialist Party wins 86 seats, a gain of 12 from the last election, while the Left Bloc doubles its vote share from 2011 to end as the Assembly's third-largest party with 19 seats. Turnout falls to 56%, the lowest recorded in a legislative election since the Carnation Revolution.[19]
Socialist Party leader António Costa declares he will not resign from his post despite his party's results falling below pre-election expectations.[20]
22 October – President Aníbal Cavaco Silva invites Pedro Passos Coelho to continue on as Prime Minister of a minority government, citing a 40–year precedent that the leader of the Assembly's largest party is asked to take office.[21] António Costa subsequently announces that Passos Coelho's re-appointment will be met with a parliamentary vote of no confidence in his administration.[22]
2 November – Heavy rainfall of up 15 centimetres (5.9 in) in 24 hours causes flash floods in Albufeira and the wider Algarve region, killing one person.[23]
10 November – MPs approve a vote of no confidence in the government of Prime Minister Passos Coelho following an agreement between members of the Socialist Party, the Communist Party, and the Left Bloc. At just 11 days Passos Coelho's administration becomes the shortest-lived government in Portuguese history.[24]
24 November – António Costa is appointed as the new prime minister by President Cavaco Silva as head of a four-party coalition between the Socialist Party, the Left Bloc, the Communist Party, and the Green Party. Costa is formally sworn into office two days later,[25] and agrees to abide by a series of six conditions set out by the President, which include following eurozone budget regulations and maintaining Portugal's international responsibilities as a member of NATO.[26]
^Ruel, Teresa (2015). "Madeira Regional Elections 2015: A Polity Tyrannized by Majorities or the End of an Era?". Regional and Federal Studies. 25 (3): 313–320. doi:10.1080/13597566.2015.1053876. S2CID154438492.
^De Giorgi, Elisabetta; Santana-Pereira, José (2016). "The 2015 Portuguese Legislative Election: Widening the Coalitional Space and Bringing the Extreme Left in". South European Society and Politics. 21 (4): 451–468. doi:10.1080/13608746.2016.1181862. hdl:10451/23730. S2CID156179368.