15 January – An earthquake with a local magnitude of 4.9 occurs in Arraiolos in the Evora District. Although widely felt across central and southern Portugal, no damage or injuries are reported.[4]
24 January – Prime Minister António Costa announces that Google will open a support centre for the European, African, and Middle Eastern regions in Oeiras later in the year, a move that is expected to create 500 high-skilled technology jobs.[5]
29 January – A 67-year old man is shot and killed at a school in Nazaré following a dispute between the family members of two students.[6]
1 February – The largest in a series of aftershocks following the earthquake of 15 January occurs in Arraiolos with a local magnitude of 3.1. Unlike the earlier earthquake, its effects are largely confined to Arraiolos area.[4]
25 March – Approximately 67,500 trees are planted by 3,000 volunteers in Leiria, marking the start of a reforestation project to repair a 13th century pine forest badly affected by wildfires in October 2017.[7]
April to June
13 April – MPs approve a law allowing individuals to change their gender on legal documents from the age of sixteen without the need of a medical report.[8]
10 May – President Marcelo Rebelo de Sousa vetoes the law passed by MPs on 13 April allowing individuals to change their gender from the age sixteen without a medical report.[10]
15 May – Approximately 50 masked intruders gain access the training centre of football club Sporting Lisbon, inflicting minor injuries to players and staff and causing minor damage to facilities.[12]
3–4 August – Warm air from the Sahara causes a heat wave in which temperatures rise above 40°C. Sixteen weather stations across the country see new local temperature records on 3 August, with a high of 45.9°C recorded at Alcácer do Sal near Setúbal.[18] The warm and dry conditions cause an outbreak of wildfires, with 700 firefighters attending a blaze close to Monchique in the Algarve affecting over 1,000 hectares (3.9 sq mi) of forest.[18][19]
24 September – Archaeologists announce the discovery of a 400-year old shipwreck off the coast of Cascais thought to have been involved in the trading of spices between Europe and India. Artefacts recovered include a bronze cannon bearing the Portuguese coat of arms and Chinese porcelain dating to the time of the Wanli Emperor.[20]
13 October – Storm Leslie passes over north and central Portugal, injuring 27 people and leaving 300,000 homes without power. Hurricane-strength winds of up to 109 miles per hour (175 km/h) uproot trees and cause damage and disruption across Lisbon and the districts of Leiria and Coimbra, with Porto, Aveiro, and Viseu to the north also affected.[22]