Porto in May

When to go

The national weather institute's climate normals for the Porto / Pedras Rubras station, listed in the facts, give the usual May highs, lows and rainfall, and an average May still has several rain days, so pack for showers. Portugal's Labour Code lists the first of May among its mandatory holidays, and also Corpus Christi, which the list gives without a date, so check which holidays fall on your dates.

Trip facts

• IPMA (Portugal's Instituto Português do Mar e da Atmosfera) lists, in its 1991-2020 climate normal for the Porto / Pedras Rubras station, an average daily maximum air temperature of 20.3 °C and an average daily minimum of 12.3 °C for May. (www.ipma.pt, checked 2026-10-16)
• IPMA's 1991-2020 climate normal for the Porto / Pedras Rubras station lists an average total precipitation of 85.6 mm and an average of 8.9 days with precipitation of 1 mm or more for May. (www.ipma.pt, checked 2026-10-16)
• Article 234 of Portugal's Labour Code, in the consolidated text on the Procuradoria-Geral Distrital de Lisboa's legislation site, says the mandatory holidays are January 1, Good Friday, Easter Sunday, April 25, May 1, Corpus Christi (Corpo de Deus), June 10, August 15, October 5, November 1, and December 1, 8 and 25. (www.pgdlisboa.pt, checked 2026-10-16)
• The EU's official travel site says the Entry/Exit System (EES) registers non-EU nationals travelling for a short stay each time they cross the external borders of the European countries using the system, and its list of those countries includes Portugal. (travel-europe.europa.eu, checked 2026-10-16)
• The EU's official travel site says the progressive start of the Entry/Exit System (EES) lasted until 9 April 2026 and that from 10 April 2026 the EES is fully operational at all external border crossing points of the European countries using the system. (travel-europe.europa.eu, checked 2026-10-16)
• The EU's official ETIAS page says ETIAS is currently not in operation and no applications for travel authorisations are collected at this point, and that the European Union will inform about the specific date for the start of ETIAS several months prior to its launch. (travel-europe.europa.eu, checked 2026-10-16)
• Porto City Council's flyer on the city's Municipal Tourist Tax (MTT) says the MTT is €3 per night, up to a maximum of €21 (or seven consecutive nights), and that children and young people aged 12 and under are exempt. (taxaturistica.cm-porto.pt, checked 2026-10-16)
• Porto Airport's website, run by ANA Aeroportos de Portugal, says you can get to the airport or to the city centre by metro and that Line E (Purple), Airport – Estádio do Dragão – Airport, runs every 20 or 30 minutes, depending on the time and day of the week. (www.portoairport.pt, checked 2026-10-16)
• Visit Porto, the Municipality of Porto's official tourism site, describes Porto as a gathering of 8 districts: Historic, Downtown, Boavista, Campanhã, Atlantic, Bonfim, Republic and University. (visitporto.travel, checked 2026-10-16)