Spring — March to May
Spring is when Lisbon starts to feel like itself again. March is transitional and can still be showery (13–18°C), but April and May bring long sunny stretches with temperatures climbing from 16°C to a comfortable 22–24°C. The Atlantic keeps things from ever getting stuffy — there's almost always a breeze, and the light has a particular clarity that photographers chase.
This is arguably the best season to visit: warm enough for terraces and miradouros, cool enough for serious walking up Alfama's stairways without wilting, and before the July–August crowds and heat arrive. Jacaranda trees start blooming toward the end of May in parks around the city, adding a purple haze to the usual white and pastel palette.
Key events: Peixe em Lisboa (April), a major gastronomy festival celebrating Portuguese seafood with pop-up restaurants from top chefs across the country. Easter weekend brings quieter streets and traditional services in the city's churches. Lisbon Half Marathon typically runs in March, crossing the 25 de Abril Bridge.
What to pack: layers for cool mornings and evenings, a light jacket for March, breathable clothing for April and May afternoons. A light rain shell — spring showers arrive without much warning. Comfortable shoes are non-negotiable on Lisbon's hills and cobblestones year-round.
Summer — June to August
Summer in Lisbon is hot, dry, and almost rain-free, but it's tempered by the Atlantic in a way inland Iberian cities aren't. June sits around 22–27°C and is arguably the pick of the season — warm, long-daylight, and not yet at peak crowds. July and August regularly hit 28–32°C, with occasional heatwaves pushing past 35°C, especially away from the coast.
The city's defining summer feature is the wind — Lisbon's famous afternoon breeze, locally tied to the Nortada, cools things down reliably by evening even on the hottest days, which is part of why the city stays more bearable than Madrid or Seville in August. Locals head to Cascais and the coast on weekends; the centre empties out slightly while the riverfront and outdoor terraces fill up.
Key events: Festas de Lisboa, centred on Santo António on 12–13 June — the whole city fills with sardine grills, street parties, and neighbourhood parades, especially in Alfama and Graça, and is one of the best times to feel the city's community spirit. NOS Alive (July) is one of Europe's major rock and alternative music festivals, held at the Passeio Marítimo de Algés on the riverfront just outside the city. Crowds and hotel prices peak in July and August, so book Sintra and Belém tickets well in advance.
What to pack: light, breathable summer clothing, a hat, and strong sunscreen. A light layer for evenings once the wind picks up, especially near the river or on the coast. Comfortable walking shoes — the hills don't get easier because it's hot out.
Autumn — September to November
Autumn is the other prime season to visit, and many regulars rate it above spring. September holds onto summer warmth (24–27°C) with sea temperatures still good for swimming at Cascais or Costa da Caparica, while the crowds thin out noticeably compared to August. October is milder still (19–23°C), with golden light and comfortable temperatures for full days of walking.
November marks the real shift toward winter — temperatures drop to 14–18°C, rain becomes more frequent, and days shorten quickly. The Atlantic influence means autumn rarely turns cold outright; it's more a steady increase in cloud and rain than a hard seasonal break.
Key events: Lisbon & Sintra Film Festival (LEFFEST) in November brings international cinema to venues across the city. Web Summit, one of the world's largest tech conferences, takes over the city in November and fills hotels — expect higher prices and bigger crowds if your trip overlaps. Late September and October also bring wine harvest season in the surrounding regions, with new vintages appearing in Lisbon's wine bars.
What to pack: layers for September and October — warm days, cooler evenings. A proper rain jacket and umbrella from November onward, plus a medium-weight coat as temperatures drop toward winter.
Winter — December to February
Lisbon has one of the mildest winters of any European capital, but "mild" doesn't mean dry or calm. Temperatures typically run 9–15°C, rarely dropping to freezing and never seeing snow in the city itself. The defining features are rain and wind: Atlantic frontal systems roll through regularly between November and February, bringing spells of persistent rain and the kind of damp, gusty days that feel colder than the thermometer suggests.
This is genuinely low season — fewer tourists, shorter queues at Jerónimos Monastery and Belém Tower, and noticeably cheaper accommodation. On clear days, which are common between rain spells, winter light in Lisbon is beautiful, and the city's south-facing hills mean sunny spots can feel surprisingly warm even in January.
Christmas season brings lights strung across Baixa's main streets, a market and ice rink in Rossio or Praça do Comércio depending on the year, and mulled wine stalls dotted around the centre. New Year's Eve draws large crowds to the riverfront at Praça do Comércio and Terreiro do Paço for fireworks over the Tagus.
January and February are the quietest months of the year — good for budget city breaks, but pack for rain and wind rather than cold. The Carnival season (February or early March, depending on the year) brings some parades and events, smaller than Rio's but a genuine local celebration.
What to pack: a waterproof jacket, an umbrella that can handle wind (a compact one will turn inside out), warm layers for evenings, and waterproof shoes — cobblestones get slick and Lisbon's hills turn into runoff channels during heavy rain.