When to visit Lisbon: month-by-month

January and February: cheap, grey-ish, and genuinely fine

Daytime highs sit at 14-16°C, nights drop to 8°C, and the rain comes in three-day Atlantic fronts with bright cold days between them. Hotel rates are at their annual floor: central four-stars that cost €280 in July go for €110-150, and Alfama guesthouses drop to €80-100. Museums are empty, the 28E is rideable, and you can walk into any restaurant. Bring a proper waterproof and shoes with grip — wet calçada limestone is treacherously slippery and this is the season people fall.

What you lose is terrace life and daylight — sunset is around 17:45 in January. What you gain, besides money, is the city behaving normally. February brings Carnival, quieter in Lisbon than in Brazil-influenced Loures and Torres Vedras nearby, and the almond blossom starts in the south. Heating in older buildings is often poor, so check that your room has a real heater rather than a token wall unit. Pick February over January: marginally drier and the days are already lengthening.

March and April: the shoulder that behaves like summer half the time

March averages 17-19°C and April 19-21°C, with rain still likely but shorter-lived. This is when the city starts eating outdoors again. Prices sit at €130-200 for central four-stars, rising sharply for Easter, which in 2026 falls in early April and pushes rates up 30-40 per cent for the week. The Lisbon Half Marathon in March closes the 25 de Abril bridge to traffic and puts 30,000 runners across it, which is either a highlight or a traffic nightmare depending on your plans.

April is the month I would pick for a walking trip. Long light evenings, the hills manageable, wildflowers on the Sintra and Arrábida hillsides, and the day trips at their best — Sintra without the August crush, Cascais with empty coastal paths. The sea is still 15-16°C, so this is not a beach month unless you are hardy. Pack layers and an umbrella and accept that one day in four will be wet; on the other three the light on the river is the best of the year.

May: the best month, and not a close call

Highs of 22-24°C, low rainfall, 14 hours of daylight, jacarandas turning Avenida da Liberdade and Praça do Príncipe Real purple in the second half of the month, and the crowds still moderate. Every terrace is open, every viewpoint kiosk is trading, and you can climb Graça at three in the afternoon without suffering. Rates have risen to €160-240 centrally, which is 30 per cent below July for objectively better conditions. If you have one week and full flexibility, book it in May.

The caveats are minor: sea temperature is 17°C, so beach days are for sunbathing rather than swimming, and May is a busy conference and cruise month so weekends fill early. Book two to three months out for the best rooms in Príncipe Real and Chiado. The last week of May is also when Lisbon starts building up to the June festivals, with the marchas populares rehearsing in Alfama and Graça — you will hear accordion practice drifting through the lanes.

June: Santo António turns the whole city into a street party

The Festas de Lisboa run all month and peak on the nights of 12 and 13 June for Santo António, the city's patron. The marchas populares parade down Avenida da Liberdade in costume, and every old quarter — Alfama, Mouraria, Graça, Bica, Madragoa — sets up grills, bunting, beer stalls and sound systems in the streets, with grilled sardines at €2-3 and dancing until sunrise. It is unreserved, unpolished and the best thing that happens in Lisbon all year. Book accommodation three to four months ahead and expect a 25-40 per cent premium on those nights.

Weather-wise June averages 25-27°C with almost no rain and the sea warming to 18-19°C. The first half of the month is quieter and cheaper than the second. If you are a light sleeper and you book in Alfama or Bairro Alto for mid-June, understand what you are buying: there is no sleeping through it. Anyone wanting the festival atmosphere with rest available should sleep in Belém, Estrela or Parque das Nações and come in by metro.

July and August: hot, expensive and full

Highs of 28-31°C are normal and heat spikes of 36-40°C happen most summers, usually for three or four days at a time when the wind swings inland. The city is at its fullest — cruise ships, coaches, Sintra queues of an hour — and hotel rates peak at €250-450 centrally. Air conditioning stops being optional, particularly in top-floor apartments under tiled roofs. NOS Alive at Passeio Marítimo de Algés in July fills the western hotels; check festival dates before you book.

It is still workable if you invert the day: sights and walking from 08:00 to 12:00, a long shaded lunch and a siesta, back out from 18:00 to midnight when Lisbon is at its most alive. Escape routes matter — the Cascais train from Cais do Sodré, Carcavelos beach in 25 minutes, the ferry to Costa da Caparica's long Atlantic sands, or Arrábida's turquoise coves an hour south. August is also when Lisboetas leave, so some neighbourhood restaurants close for two or three weeks.

September and October: the smart traveller's window

September holds 26-28°C, the sea at its annual warmest around 20°C, and the crowds thinning noticeably after the first week. Rates fall to €180-260. This is the month for people who want summer conditions without August's density, and it is my second pick after May. Grape harvest tours run in the Setúbal and Colares wine areas, and the light in the evenings turns long and gold, which makes the miradouros extraordinary.

October is the underrated one: 21-23°C, occasional rain returning late in the month, rates back at €140-200, and a full cultural calendar as the theatres and galleries reopen. Days are still long enough for a Sintra trip without rushing. By the last week the first Atlantic storms usually arrive and the season turns. If you want warm walking weather and low prices in a single package, book the first three weeks of October and pack a light jacket for the evenings.

November and December: rain, Web Summit and Christmas lights

November is Lisbon's wettest month, averaging around 120mm and delivering long grey spells with highs of 17°C. It is also when the Web Summit fills the Altice Arena and Parque das Nações with tens of thousands of delegates, which for that week pushes hotel prices across the entire city up 50-100 per cent and empties the availability — check the dates and either avoid them or book six months out. Outside that week, November is the cheapest month of the year alongside January.

December improves in atmosphere if not in weather. The Christmas lights on Avenida da Liberdade, Rossio and Praça do Comércio go up in late November, the markets appear, Confeitaria Nacional sells bolo rei by the metre, and Christmas Eve dinner is bacalhau with cabbage and potatoes. Rates hold at €120-180 until about 27 December, then spike hard for New Year, when there are fireworks over the river from Praça do Comércio. Skip mid-November unless you have a reason; take mid-December if you want the city quiet and lit.