Lisbon in September (2027): Weather, Prices, Wine Harvest & Things to Do

⭐ Best-value September window, based on our hotel sample: weeknights in the first half of the month. Weeknight medians on 1 and 15 September were about €202 to €204, against €222 on 22 September. This is a price observation, not a weather claim; rain becomes more likely as the month goes on, ahead of a much wetter October.

ℹ️ These are our editorial assessments of how September conditions affect each part of a trip, not review scores. Temperature and rainfall figures are climate normals from IPMA, Portugal's weather service, for 1991 to 2020.

💰 September 2027 hotel rates in our sample (central Lisbon, 4-star):
Weeknights: median ~€202–222 (middle half roughly €153–338) · Saturdays: median ~€213–214 (middle half roughly €159–294)
From a sample of 81 to 103 four-star hotels within 2 km of Baixa, quoted on 2 October 2026 for one night for two adults, room only, before taxes, on nine September 2027 dates. Fewer hotels returned rates than for summer dates, so these medians are less certain. Lisbon's tourist tax of €4 per person per night (maximum seven nights) is added on top. Rates change daily, so check live prices for your dates.

September has a lot going for it in Lisbon. The weather is still summer, with highs around 27°C and rain on only a few days, but the fierce heat of July and August eases, and the sea is at its warmest of the year. Walking the hills becomes comfortable again, and the wine country across the river is in harvest.

The honest tradeoff is price. In our sample, September rates were higher than any August date we checked, so the month is not a bargain. We would book September for swimming, walking and wine, choose weeknights early in the month if price matters, and keep a light layer for the evenings, which draw in noticeably by the end of the month.

Temperature

IPMA's 1991 to 2020 climate normals put the September average high at about 27°C and the low at about 18°C, roughly two degrees cooler than August by day. Early September can still bring hot spells, and the highest September temperature in IPMA's 1991 to 2020 record is 38.5°C, but most days are warm rather than hot.

Rain Pattern

September averages about 39 mm of rain on roughly 4 days, much more than August's 5 mm but still mostly dry. Long settled, sunny spells are typical, and rain becomes more likely as the month goes on, ahead of October's 111 mm.

Daylight and Outdoor Conditions

Sunrise moves from about 07:04 to about 07:30 across the month, and sunset from about 20:09 to about 19:22, so evenings shorten by around three quarters of an hour. Station averages from the German Weather Service put September at about 260 hours of sunshine.

September prices in our sample were higher than August's, even as the beaches and sights became a little calmer after the summer holidays.

1 to 15 September: late summer

Weeknight medians were about €202 on 1 September, €208 on 8 September and €204 on 15 September, and Saturdays about €213. These were the cheapest September dates in our sample.

16 to 30 September: early autumn

Saturday medians held at about €214, and the weeknight median rose to about €222 on 22 September, the dearest date we sampled, before easing to about €212 on 29 September. Fewer hotels returned rates for late September, which makes those figures less certain. Most people do not realise that September is not a shoulder-season bargain in Lisbon: in our sample, every September date cost more than every August date. Remember the tourist tax of €4 per person per night on top of the room rate.

Harvest season on the Setúbal Peninsula

Across the river from Lisbon, the Setúbal Peninsula is the nearest wine region to the city, and September is its harvest. The harvest there runs from late August into September, and wineries in the regional wine commission open up for harvest experiences through the month, from grape picking to tastings in the cellars, according to Publituris. In 2026, the Festa das Vindimas in Palmela ran from 3 to 8 September; the 2027 dates had not been announced when we checked. Our Lisbon wine tour guide compares the winery day trips to the region.

The warmest sea of the year

The Atlantic off Lisbon averages about 19.9°C in September, according to seatemperature.org, marginally warmer than August, which makes the first half of the month an excellent time to swim at Carcavelos, Cascais or Costa da Caparica. In 2026, the lifeguarded bathing season at Cascais and Costa da Caparica ran to 30 September; check the 2027 dates, and swim only where lifeguards are on duty. Our Lisbon surf lessons guide covers the beaches in more detail.

September's downsides are few, but they are worth knowing before you book.

A budget trip

In our sample, September rates were higher than any August date we checked, at about €202 to €222 a night. If price matters more than warm water, our Lisbon in March guide covers the same city for considerably less.

Late-season swimming without lifeguards

The sea stays warm, but in 2026 the lifeguarded season ended on 30 September. Swim only at lifeguarded beaches, and check the 2027 dates if your trip runs late in the month.

Guaranteed dry weather at the end of the month

Rain is still infrequent, but it becomes more likely as the month goes on, and October averages almost three times as many rain days. Pack a light layer and a compact umbrella if your trip runs into the last week; our is Lisbon safe guide covers the walking advice for wet cobbles.

• A harvest experience in Palmela or Azeitão: wineries on the Setúbal Peninsula open for grape picking and tastings through September.
• A beach day by train: the suburban line from Cais do Sodré follows the coast to Carcavelos and Cascais.
• LX Factory in the evening: bookshops, cafés and bars in a former industrial complex in Alcântara.
• Sunset at the miradouros: sunset moves from about 20:09 to 19:22, so the viewpoints shift from after dinner to before it.

• Choose early-September weeknights if price matters: 1 and 15 September were the cheapest dates in our sample.
• Swim in the first half of the month: the sea is at its warmest and the lifeguard season is still running.
• Plan a harvest day across the river: wineries on the Setúbal Peninsula run harvest experiences through September; book ahead.
• Keep a light layer for the evenings: sunset moves back by around three quarters of an hour across the month.
• Book Sintra's timed tickets ahead: September is still busy at the palaces.
• Check the date of the Fátima pilgrimage: 13 September is one of the monthly anniversary dates.
• Plan Belém for a day other than Monday: Jerónimos Monastery is closed on Mondays.
• Budget for the tourist tax: Lisbon adds €4 per person per night, up to seven nights, on top of the room rate.
• Visiting at a different time of year? Our Lisbon in August guide covers the month before, with lower rates and peak beach crowds, our Lisbon in July guide covers high summer, and our Lisbon in October guide covers the month after, when the rain returns and the big-wave season begins.