Lisbon in August

When to go

August brings the Jazz em Agosto festival at the Calouste Gulbenkian Foundation, which Visit Lisboa lists as still to be confirmed, so check the dates before you plan around it. A national holiday falls in August, and the national weather institute's August normals, listed in the facts, include rainfall and a count of hot days to compare with your plans.

Trip facts

• IPMA (Portugal's Instituto Português do Mar e da Atmosfera) lists, in its 1991-2020 climate normal for the Lisboa / Gago Coutinho station, an average daily maximum air temperature of 29.0 °C and an average daily minimum of 18.5 °C for August. (www.ipma.pt, checked 2026-10-15)
• IPMA's 1991-2020 climate normal for the Lisboa / Gago Coutinho station lists an average total precipitation of 5.0 mm for August. (www.ipma.pt, checked 2026-10-15)
• IPMA's 1991-2020 climate normal for the Lisboa / Gago Coutinho station lists an average of 10.7 days in August with a maximum air temperature of 30 °C or higher, which it calls 'dias quentes' (hot days). (www.ipma.pt, checked 2026-10-15)
• Visit Lisboa lists Jazz em Agosto'27 for August 2027 (to be confirmed), with concerts at the Calouste Gulbenkian Foundation across the Open-Air Amphitheatre, the Grand Auditorium and Auditorium 2. (www.visitlisboa.com, checked 2026-10-15)
• 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 2026-10-15)
• 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 2026-10-15)
• The EU's official travel site 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 2026-10-15)
• A Lisbon City Council flyer on the municipal tourist tax (dated August 2024) says the tax on overnight stays is applied to guests aged thirteen and over, per person and per overnight stay, up to a limit of 7 nights per stay, at €4 per night up to a maximum of €28. (informacoeseservicos.lisboa.pt, checked 2026-10-15)
• Metro de Lisboa's page for its Aeroporto station gives the station's location as the Lisbon Airport building (Arrivals Zone). (www.metrolisboa.pt, checked 2026-10-15)
• Metro de Lisboa's timetable page says that under normal operating conditions the Metro opens at 6:30 a.m. and closes at 1:00 a.m. every day, including weekends and public holidays. (www.metrolisboa.pt, checked 2026-10-15)