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Miradouro da Senhora do Monte at golden hour in late September, the light that decides the best time to visit Lisbon

Best Time to Visit Lisbon

The best time to visit Lisbon is decided by two tables that rarely sit on the same page: the climate normals, and the calendar of the things that close. The weather figures below are the Instituto Português do Mar e da Atmosfera's 1991–2020 normals for the Lisboa Geofísico station in the city centre, read from the IPMA climate-normal sheet on 29 August 2026. The closures are the 2026 facts we could source from each institution — the funiculars shut since the 3 September 2025 derailment, the Belém Tower reopened on timed slots since 27 May 2026, the tile museum closed since 1 November 2025 — and the festival dates come from the city's own Festas de Lisboa programme. Where a judgement follows the figures it is ours and it is labelled as a verdict. Everything else on the Lisbon city guide that depends on a date — the itineraries, the day trips, what things cost — points back here.

Quick answer Two good windows, one hot trap, one wet bargain

Come between mid-April and mid-June, or from the second week of September to the end of October. On IPMA's thirty-year normals those months average highs of 20.4–26.6°C, rain falls on two to eight days a month, and the Sintra hills are walkable without a 09:30 start. July and August average 28.2–28.8°C with 8.5 and 10.2 days above 30°C — bearable by the river, punishing on the castle hill at two in the afternoon. November is the wettest month of the year at 133.9 mm across ten rainy days. The quiet, cheap stretch is January and February, when a Jerónimos cloister slot is still on sale the night before and the Oceanário's lowest price tier is easy to hit.

Key takeaways

Lisbon Month by Month

Average daily maximum temperature by month in Celsius, with the Fahrenheit reading underneath, from the IPMA 1991–2020 climate normals for the Lisboa Geofísico station (IPMA 535). The bands below the bars come from the same sheet's rain and hot-day counts and from the 2026 festival calendar; the crowd band is our reading and is labelled as such.

August is the hottest month on the thirty-year mean at 28.8°C, and the record for the station is 43.3°C on 4 August 2018. July is the driest month on the same sheet: 2.6 mm across 0.6 rainy days, which is why a July plan can leave the umbrella at home and a November one cannot.

Lisbon Weather by Month

The IPMA 1991–2020 climate normals for Lisboa Geofísico, version 1.0 published 2024 and read on 29 August 2026: mean daily maximum and minimum temperature, mean monthly rainfall, and the mean number of days with at least a millimetre of rain. The annual total is 793.5 mm, and well over half of it — 456.8 mm — falls between October and January.

Month Average high Average low Rain Rainy days
January 15.1°C (59°F) 8.6°C (47°F) 103.8 mm 10.0
February 16.4°C (62°F) 9.1°C (48°F) 77.8 mm 7.9
March 18.9°C (66°F) 11.0°C (52°F) 68.7 mm 7.6
April 20.4°C (69°F) 12.3°C (54°F) 71.8 mm 7.9
May 23.1°C (74°F) 14.4°C (58°F) 57.8 mm 5.8
June 26.1°C (79°F) 16.8°C (62°F) 14.1 mm 2.0
July 28.2°C (83°F) 18.2°C (65°F) 2.6 mm 0.6
August 28.8°C (84°F) 18.8°C (66°F) 5.4 mm 1.1
September 26.6°C (80°F) 17.6°C (64°F) 38.6 mm 3.8
October 22.8°C (73°F) 15.3°C (60°F) 110.6 mm 8.7
November 18.1°C (65°F) 11.8°C (53°F) 133.9 mm 9.9
December 15.4°C (60°F) 9.4°C (49°F) 108.5 mm 10.0

The station sits in the city, a few hundred metres from the Rato metro stop, so the figures describe the hills you will walk rather than the airport plain. IPMA publishes no monthly sea-temperature normal; the tourist board's own traveller page gives the sea at 17.1–19.5°C, which is the number to remember before promising anyone a swim at the beaches. The Fahrenheit readings are rounded conversions of the Celsius means, not separate measurements.

The Rainy Season, and What the Heat Actually Does

Lisbon's rain is Atlantic and concentrated: 456.8 mm of the 793.5 mm annual total falls in the four months from October to January, and November alone carries 133.9 mm over 9.9 days. That is not drizzle. A November front can put a day's rain down in three hours and then clear, so the working method is to plan the museums for the morning the forecast is worst and to keep the miradouros for whichever hours clear. The calçada pavement — the small limestone cubes on every hill — is the practical hazard: wet, it is as slippery as ice, and the Alfama stairs in December need shoes with real tread, not the smooth soles a summer visitor packs.

The heat is a different kind of problem because it comes with no rain at all. On the normals, July has 0.6 rainy days and August 1.1; the sky stays clear, the tiles reflect it, and the count of days above 30°C reaches 8.5 in July and 10.2 in August. Nothing in the city closes for heat. What changes is the order of the day: the castle hill and the Alfama climb before 11:00, the Oceanário or the Gulbenkian through the middle, the river after 18:00 when the westerly comes up the estuary. Belém is the honest exception — the tower and the monastery stand on a treeless waterfront and the queue for the Jerónimos cloister has no shade at all, so a summer Belém morning starts when the church opens at 10:30 and not later.

One trap is specific to Sintra. The hills above the town are wetter, cooler and mistier than the city on the same day — locals will tell you the palace disappears into cloud while Lisbon bakes — and the Pena slot has no late tolerance in any weather. Give the Sintra day the first clear morning in the forecast, not the last one.

Month by Month, With the Dates That Move a Plan

Each month below carries its IPMA thirty-year normals, then the 2026 calendar facts we could source from the institution itself — closures, festival dates and the slot rules. Where a verdict follows, it is ours.

Lisbon in January

Average high 15.1°C (59°F), low 8.6°C (47°F), 103.8 mm across ten rainy days — the joint-wettest month by day count and the quietest of the year. 1 January is a national holiday and the state monuments close, so the first of the month is not a Jerónimos day. The Oceanário's cheapest tier at €25 (about $29) is easy to reach because the slots are open. Verdict: the month to see the cloister at 10:30 with the arcades to yourself, if you accept a 17:30 sunset and a wet afternoon in two.

Lisbon in February

Average high 16.4°C (62°F), low 9.1°C (48°F), 77.8 mm over 7.9 days. Carnival in 2026 fell on 17 February; it is not a public holiday and the city's blocos parade through the neighbourhoods over the weekend before. Nothing major closes for the month.

Verdict: the cheapest fortnight of the year to combine the big three monuments with a Sintra day, and the one month the Pena Palace queue is short enough that the 30-minute uphill walk from the gate is the only wait.

Lisbon in March

Average high 18.9°C (66°F), low 11.0°C (52°F), 68.7 mm over 7.6 days. From 1 March São Jorge Castle switches to its summer hours, 09:00–21:00, which puts a sunset from the ramparts inside the ticket for the first time in the year. The Lisboa Card's 2026–2027 prices run from 1 April, so a late-March purchase is on the old sheet.

Verdict: the first month that works outdoors; bring a shell for the showers.

Lisbon in April

Average high 20.4°C (69°F), low 12.3°C (54°F), 71.8 mm over 7.9 days. Good Friday 3 April and Easter Sunday 5 April 2026 are holidays; 25 April, Freedom Day, is a Saturday in 2026. The Sintra 434 bus and the Pena slots fill from Easter onward.

Verdict: yes, April is a good time to visit Lisbon — the best month for the three-day route, with one wet day to plan around.

Lisbon in May

Average high 23.1°C (74°F), low 14.4°C (58°F), 57.8 mm over 5.8 days. 1 May is a holiday. The Feira do Livro opens in Parque Eduardo VII on 27 May and the Festas de Lisboa programme starts on 29 May with the first marchas at MEO Arena. The Belém Tower reopened on 27 May 2026 after its works, so May 2027 will be its first full spring back on sale.

Verdict: the month we would pick for a first visit.

Lisbon in June

Average high 26.1°C (79°F), low 16.8°C (62°F), 14.1 mm over two days. Corpus Christi 4 June and Portugal Day 10 June are holidays, and 13 June, Santo António, is Lisbon's municipal holiday — a Saturday in 2026. The marchas parade down Avenida da Liberdade on 12 June at 21:00 and the arraiais run all night; Rock in Rio Lisboa takes Parque Tejo on 20, 21, 27 and 28 June.

Rooms in Alfama and Graça for 12–13 June go months ahead. Verdict: the best-lit, best-fed month of the year, and the one you must book earliest.

Lisbon in July

Average high 28.2°C (83°F), low 18.2°C (65°F), 2.6 mm — the driest month on the sheet, with 8.5 days above 30°C. NOS Alive runs at Passeio Marítimo de Algés on 8, 9 and 10 July, which fills the Cascais-line trains in the evening. Pastéis de Belém stays open to 22:00 from July to September. Verdict: workable with early slots and river afternoons; the wrong month for the castle at 14:00.

Lisbon in August

Average high 28.8°C (84°F), low 18.8°C (66°F), 5.4 mm, 10.2 days above 30°C — the hottest month and the one with the warmest nights. 15 August is a holiday, a Saturday in 2026. Jazz em Agosto fills the Gulbenkian garden amphitheatre from 31 July to 9 August. Many small restaurants close for their own holidays; the place_cards on where to eat print each venue's stated closing.

Verdict: the beach month — Carcavelos is 27 minutes by train — not the museum month.

Lisbon in September

Average high 26.6°C (80°F), low 17.6°C (64°F), 38.6 mm over 3.8 days, and 5.7 days still above 30°C in the first half. Is September a good time to visit Lisbon? On the figures it is June's twin with warmer sea, and the crowd — our reading — stays high until the schools go back in the third week.

Verdict: the second half of September is the best fortnight of the year for anyone who wants sea, Sintra and an open-air dinner in the same trip.

Lisbon in October

Average high 22.8°C (73°F), low 15.3°C (60°F), 110.6 mm over 8.7 days — the rain returns in the second half. 5 October, Republic Day, is a Monday in 2026. The EDP Lisbon Marathon starts in Carcavelos at 08:00 on Saturday 10 October and finishes in Praça do Comércio, with the half marathon over the bridge on Sunday 11 October; both close the riverside roads for the morning. Verdict: the photographers' month, for the low light on the tiles from the Graça miradouros.

Lisbon in November

Average high 18.1°C (65°F), low 11.8°C (53°F), 133.9 mm over 9.9 days — the wettest month of the year by volume. 1 November, All Saints, is a Sunday in 2026. Web Summit takes MEO Arena and the FIL halls in Parque das Nações from 9 to 12 November and empties the city's mid-range hotel stock for the week. Verdict: the trap month for anyone who came for the miradouros, and the cheapest one for the museums — if you avoid the summit week.

Lisbon in December

Average high 15.4°C (60°F), low 9.4°C (49°F), 108.5 mm over ten days. 1 December and 8 December are holidays, both Tuesdays in 2026, and 25 December closes everything. The Wonderland Lisboa market in Parque Eduardo VII ran from 28 November 2025 to 4 January 2026 last season; the 2026 dates were not published when we checked. New Year's Eve is a free stage in Terreiro do Paço from 21:30 with fireworks over the river at midnight.

Verdict: short, wet, warm-lit days; good for the rainy-day plan, poor for Sintra.

What Gets Cheaper in Winter, and What Does Not

Less than you would hope. Unlike the Italian cities, Lisbon's monuments publish no low-season tariff: the Jerónimos cloister is €18 (about $21) in January and in August, the Belém Tower €15 (about $18), São Jorge Castle €17 (about $20), the Pena Palace €45 (about $53) for park and palace. The Lisboa Card is €31, €51 or €62 (about $36, $60 or $73) for 24, 48 or 72 hours on a price sheet valid from 1 April 2026 to 31 March 2027, in every month.

What winter buys is not a discount but availability. The Oceanário's three-tier ticket — €29, €27 or €25 (about $34, $32 or $29) depending on the entry time — is priced by demand, and the cheapest tier is a realistic choice in January where it is a dawn slot in August. A Jerónimos slot is on sale the evening before. The Pena Palace, which sells out days ahead from Easter to October, has same-day tickets in February. And the tourist tax is €4 (about $5) per person per night in every season, capped at seven nights, from age 13, so it does not move either.

The things that actually close in winter are hours, not doors. The castle drops from 09:00–21:00 to 09:00–18:00 from 1 November to the end of February, which takes the ramparts sunset off the table. Pastéis de Belém closes at 21:00 rather than 22:00 outside July to September. Daylight runs out around 17:20 in December, which is the number that really shortens a winter plan — the one-day route is built for a nine-hour day and December gives you eight.

There is one winter closure that is not seasonal and has no end date: the Glória, Bica and Lavra funiculars and the Santa Justa lift have been shut since the 3 September 2025 derailment on the Glória line, and carris.pt printed no reopening date when we read it on 29 August 2026. The replacement buses run in every month; the funiculars themselves do not, whatever the older guides say.

Crowds: What Is Measured, and What Is Our Reading

Lisbon publishes no month-by-month visitor curve we could read, so this section separates the two things it can say: the dated facts that cause a crowd, and our reading of when the crowd is there.

The dated facts first. The Festas de Lisboa run from 29 May to 28 June 2026 on the city's own EGEAC programme, with the marchas on Avenida da Liberdade on 12 June at 21:00, the Santo António weddings the same day, the procession through Alfama on 13 June and the closing concert with fireworks in the Jardins da Torre de Belém on 26 June at 21:30. Rock in Rio Lisboa fills Parque Tejo on 20, 21, 27 and 28 June; NOS Alive fills Algés on 8, 9 and 10 July; Web Summit fills Parque das Nações on 9–12 November.

Cruise ships dock at the Jardim do Tabaco terminal, a ten-minute walk from Alfama, and the national tourist office at Terreiro do Paço is open every day 10:00–19:00 for the days you want to ask what is in port.

Our reading, offered as a reading and not a statistic: the coach and cruise season runs from Easter to the end of October and arrives in a wave that hits Belém between 10:00 and 15:00 and the Alfama–castle hill between 11:00 and 17:00. That is the whole basis of the advice on this site to take the church at 10:30, the cloister slot at opening, and the castle after 18:00 in summer. Tram 28 is a separate case: it is full in every month from mid-morning, because it is a commuter tram that the guidebooks turned into an attraction, and the tram page explains the early-morning trick.

The counter-intuitive point is 12–13 June. It is the best night of the year to be in the city and the worst two days to try to see anything: Alfama, Graça and Bica are one continuous arraial from the afternoon of the 12th, the streets around the Sé close for the procession on the 13th from mid-afternoon into the evening, and the tram does not run through the party. If you can get a room, come for the night and treat the 13th as a beach day at Carcavelos.

In January, February and the first half of March the same streets belong to the city again. That is the honest case for winter: not the price, which barely moves, but the absence of the queue.

Free Days: the Rule That Changed in 2024

The old advice — 'come on the first Sunday and the museums are free' — is out of date and it matters, because it is still in most of the pages that rank for this question. Since 1 August 2024, the free Sundays and holidays at the state museums and monuments run by Museus e Monumentos de Portugal are for residents in Portugal only, on presentation of the Citizen Card, and residents also get 52 free entries a year on any day. There is no free Sunday for a visiting tourist and there is no first-Sunday rule. Children up to 12 are free everywhere in the scheme in every month, which is the number that actually changes a family budget.

A few exceptions are printed by the institutions themselves and are worth knowing when you choose a date. The Padrão dos Descobrimentos is free for Lisbon residents on Sundays and holidays until 14:00 — residents again, not visitors. The Museu da Água's aqueduct and Mãe d'Água reservoir are free on the first Sunday of the month. Neither the Quinta da Regaleira nor any of the Parques de Sintra sites is in the national scheme at all, so the Pena Palace costs €45 (about $53) on a Sunday as on a Tuesday. The tickets index prints every official price and the free-day rule beside it.

The practical consequence: a Sunday is a normal paid day for you, and a slightly busier one, because residents come in on their free day. If you want a quiet Sunday, make it a Sintra Sunday — the Sintra sites are outside the scheme, so the resident wave does not reach them — or a beach one.

Evening Openings, by Season

Lisbon's evenings are longer than most cities' and the season sets how long. São Jorge Castle stays open to 21:00 from March to October, which puts a rampart sunset inside the €17 (about $20) ticket for eight months of the year; from November to February it closes at 18:00 and the sunset happens without you. The Time Out Market runs Sunday to Wednesday 10:00–00:00 and Thursday to Saturday 10:00–02:00 in every month. The metro runs 06:30–01:00, and the Carris night network, the Rede da Madrugada, covers 23:30–05:35 with extra 02:00 departures from Cais do Sodré — the transport page has the lines.

The fado houses are the year-round evening. The three shows on this site — a 50-minute show with wine inside the castle walls, live fado with port at a historic house and a Chiado show — run in every month, and in the wet ones they are the answer to a November evening at 18:00 when the miradouros are in cloud. On the river, the sunset cruises are seasonal in their light rather than their schedule: the sun sets over the 25 de Abril bridge at about 21:00 in late June and at about 17:20 in late December, so the 'sunset' departure time moves by almost four hours across the year. Check the departure time against the sunset before you book a December one.

The street rule that arrived in 2026 is worth knowing for a summer evening: since 14 February 2026 the city bans the sale of alcohol for consumption outside the establishment from 23:00 to 08:00 Sunday to Thursday and from midnight to 08:00 on Fridays, Saturdays and holiday eves, city-wide. Bars and licensed seated terraces are unaffected; the plastic cup on the Bairro Alto pavement is what the rule targets. The nightlife page has the detail.

Sintra, the Coast and Porto, by Season

Sintra is the day trip that most rewards a good month and most punishes a bad one. The park and palace are open all year — park 09:00–19:00, palace 09:30–18:30, last entry 18:00 — but the hills sit in their own microclimate and the palace interior is a timed slot with no late tolerance. In April, May and October the walk from the gate is a pleasure and the mist is a photograph; in a wet December it is a 30-minute climb in cloud to a slot you cannot miss. The Sintra page and the Pena ticket page carry the slot mechanics; the full-day tour that includes the Pena ticket removes the timing risk in any month for €44 (about $51).

The coast runs on the sea temperature more than the air. With the tourist board's 17.1–19.5°C sea figure, a swim is a June-to-October proposition for most people; the Carcavelos train is 27 minutes from Cais do Sodré in every month and the beach is a fine winter walk. Cascais by the same train is a year-round afternoon. The Arrábida coast south of the river is the summer alternative with warmer, sheltered water; the kayak day runs in the warm months.

Porto is the one destination where the season reverses the advice. It is wetter than Lisbon in every month and noticeably so in winter, so if the Porto leg is fixed, put it in the drier half of the trip. The Alfa Pendular is €35.70 (about $42) in tourist class in every month on the 2026 tariff; the Porto page compares the train with the coach day trip. Fátima, Nazaré and Óbidos are the winter-proof trio — the Nazaré waves are a November-to-February spectacle, and the Fátima and Nazaré day runs all year.

Four Bookings That Fit the Season

A Sintra day with the Pena slot already inside it, the food walk that works in the rain, the sunset boat for the warm months, and a fado house for the wet ones. Prices, ratings and review counts are the platform's own figures, checked on 29 August 2026.

Initiation Well at Quinta da Regaleira on a Sintra, Pena, Regaleira, Cabo da Roca and Cascais tour from Lisbon from €44

Lisbon: Sintra, Pena, Regaleira & Cabo Roca Coast & Cascais

€44 — listed at $28.03; the platform charges in your own currency

★★★★★ ★★★★★ 4.7(23,619 reviews)· 9.5 - 10 hours

Listing details checked 2026-08-29

Ten-hour Sintra circuit at the low end of the price range: Pena Palace and Quinta da Regaleira, free time at Cabo da Roca, then Cascais, Guincho and Estoril…

  • Discover the fairytale village of Sintra and its unique atmosphere
  • Visit the mysterious Quinta da Regaleira, a UNESCO World Heritage Site
  • Explore the colorful Pena Palace, one of Portugal’s Seven Wonders
  • Enjoy breathtaking views of Cape Roca, the westernmost point of mainland Europe
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Plates of petiscos and glasses of Portuguese wine on a Lisbon food and wine small-group walking tour from €70

Lisbon: Food and Wine Small Group Walking Tour

€70 — listed at $81.09; the platform charges in your own currency

★★★★★ ★★★★★ 4.9(4,938 reviews)· 3 hours

Listing details checked 2026-08-29

Three-hour small-group food walk with 15 food and wine tastings and a culinary guide. Arrive hungry — 15 stops is a full meal.

  • Discover the culinary history of Portugal on a guided walking tour of Lisbon
  • Enjoy 15 different tastings of local flavors across 6 popular spots
  • Try the famous Portuguese fortified Port wine with some delicious local cheese
  • Discover traditional cafés, taverns, and restaurants popular with the locals
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Wooden deck of the historic Barco EVORA at sunset on a Lisbon sunset boat tour with music and welcome drink from €20

Lisbon: Sunset Boat Tour with music and free welcome drink

€20 — listed at $23.05; the platform charges in your own currency

★★★★★ ★★★★★ 4.6(4,195 reviews)· 2 hours

Listing details checked 2026-08-29

Two-hour sunset sail aboard the historic Barco EVORA with music and one welcome drink each. Calmer than the DJ party boat, longer than the 90-minute cruise.

  • Enjoy a sunset boat tour in Lisbon aboard the historic Barco EVORA
  • Enjoy 1 free welcome drink per person
  • Enjoy a 2-hour experience planned to match the best moment of sunset
  • Enjoy music on board and buy drinks from the bar
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Fado singer with two guitarists performing in a candlelit room at a top-rated authentic Fado show with wine in Lisbon from €20

Lisbon: Top-Rated Authentic Fado Show & Wine

€20 — listed at $15.06; the platform charges in your own currency

★★★★★ ★★★★★ 4.8(6,715 reviews)· 50 minutes

Listing details checked 2026-08-29

Fifty-minute live Fado show with explanations between songs and a glass of wine. A show, not a dinner — eat before or after.

  • Experience one of Lisbon’s highest-rated Fado shows
  • Enjoy a glass of Port wine or Moscatel
  • Hear live traditional Fado from male and female singers
  • Learn about Fado’s history, instruments, and songs from the musicians
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The Best Month for You, by What You Came For

Five readers, five answers. These are our conclusions from the IPMA figures and the 2026 calendar above, not official recommendations.

First visit, one big trip. Mid-May, or the second half of September. Averages of 23–27°C, two to six rainy days, the castle open to 21:00, and the Sintra hills clear more mornings than not.

Monuments first, crowds last. Late January or February. Same prices, empty cloister at 10:30, same-day Pena tickets, and a wet afternoon in two that you spend at the Gulbenkian.

Families. Late June after the Festas, or early September. The beaches at Carcavelos and Caparica are warm, the Oceanário is open 10:00–20:00 daily, and children under 12 are free at every state monument in every month — the day-plan version is on Lisbon with kids.

Photographers. October, for the low light on the Alfama tiles from the Graça miradouros, and for the first storms over the bridge. Bring rain cover: 110.6 mm across nine days.

Budget. November after Web Summit, or the first fortnight of December before the 8 December bridge. Wettest stretch of the year, shortest days, and the museums, fado houses and tascas at their quietest — the rainy-day plan is written for it.

How many days you need is a different question from when to come, and it is answered on the plan hub. In short: three nights covers the city, four to seven if Sintra, the coast and a Porto day are in the plan, and the answer does not change with the month — what changes is how many of those days you spend indoors.

Plan the Rest of the Trip

Three days that dodge the closures

A day-by-day route with the Belém slots and the Sintra day already placed: three days in Lisbon.

Walkable plus one train

The fixed dates in detail

Santo António, Rock in Rio, Web Summit and the public holidays, each with what it closes: the Lisbon events calendar.

12 months

Day trips compared by season

Sintra, Cascais, Porto, Fátima, Évora and Arrábida, each with the train weighed against the tour: day trips from Lisbon. Or go back to the Lisbon city guide.

Six destinations

Best Time to Visit Lisbon: Questions

What is the rainy season in Lisbon?

October to January. On the IPMA 1991–2020 normals October averages 110.6 mm, November 133.9 mm, December 108.5 mm and January 103.8 mm, on nine to ten rainy days each. July is the driest month at 2.6 mm across 0.6 days. The full grid is in the weather table.

What is the cheapest month to visit Lisbon?

For tickets, none — no monument in the city publishes a seasonal price, and the tourist tax is €4 (about $5) a night all year. What moves is availability and, in our reading, room rates: January and February are the quiet months, and the Oceanário's lowest €25 (about $29) tier is easy to hit then. See what gets cheaper in winter and what Lisbon costs.

What is the worst time to visit Lisbon?

For the monuments, the 12–13 June Santo António days, when Alfama is one street party and the Sé district closes for the procession — wonderful for the party, useless for sightseeing. For the walking, the last week of July and the first three of August, when IPMA counts 8.5 to 10.2 days above 30°C and the castle hill has no shade. For the light, November. Each has its answer in the month notes.

Is September a good time to visit Lisbon?

Yes — on the figures it is June's twin with a warmer sea: average high 26.6°C (80°F), 38.6 mm of rain over 3.8 days. The first half still counts 5.7 days above 30°C and, in our reading, the summer crowd; the second half is the best fortnight of the year for sea, Sintra and open-air evenings together.

Is April a good time to visit Lisbon?

Yes. Average high 20.4°C (69°F), 71.8 mm over 7.9 days, castle open to 21:00 from March, Sintra green and walkable. Plan around Good Friday 3 April and Easter Sunday 5 April 2026, when the state monuments close, and book the Pena slot ahead — Easter is when it starts selling out.

Is August too hot for Lisbon?

It is the hottest month on thirty years of data, 28.8°C (84°F) average high with 10.2 days above 30°C and the warmest nights at 18.8°C. It is workable with the hills before 11:00, the Oceanário or Gulbenkian in the middle and the river after 18:00, and it is the best beach month. It is the wrong month for the castle at 14:00 — see the heat section.

Are the museums free on Sundays in Lisbon?

Not for visitors. Since 1 August 2024 the free Sundays and holidays at the state museums and monuments are for residents in Portugal only, and there is no first-Sunday rule. Children up to 12 are free every day. The exceptions the institutions print themselves are in free days.

The Month Is Chosen. The Sintra Slot Still Is Not.

The Pena Palace slot is the one booking that decides the shape of a Lisbon trip in any season: the full-day Sintra, Pena, Regaleira, Cabo da Roca and Cascais tour carries the palace ticket inside it, €44 (about $51), rated 4.7 from 23,619 reviews.

Climate from the IPMA 1991–2020 normals for Lisboa Geofísico, read 29 August 2026. Festival dates from the EGEAC Festas de Lisboa 2026 programme and each event's own site. Prices and ratings checked 29 August 2026.

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