Lisbon weather in August 2025

Expect daytime maximum temperatures of 28°C in Lisbon, Portugal in August based on long-term weather averages. There are 11 hours of sunshine per day on average.

  • 28°C maximum daytime temperature in August in Lisbon28
    28°C max day temperature
  • 11 hours of sunshine per day
  • 2 days with some rainfall in August in Lisbon2
    2 days with some rainfall
  • 18°C minimum night-time temperature in August in Lisbon18
    18°C min night temperature
  • 14 hours of daylight per day in August in Lisbon14
    14 hours of daylight per day
  • Moderate heat & humidity in August in LisbonM
    Moderate heat & humidity
  • 5 mm monthly rainfall in August in Lisbon5
    5 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Lisbon8
    8 (Very High) UV index
  • 19°C sea temperature in August in Lisbon19
    19°C sea temperature

More about Lisbon

Lisbon by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Portugal

Expedia offers: up to 35% off hotel long stays

  • Save up to 35% when you book 5 nights or more
  • Book hotel stays in top destinations worldwide
  • Including Barcelona, New York, Bangkok & beyond
Go to Expedia deal >>

View all Expedia offers

ExpediaTravel deal finder

The August weather guide for Portugal (Lisbon) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about Portugal

How hot is it in Lisbon in August?

Daytime temperatures usually reach 28°C in Lisbon in August with moderate heat and humidity, falling to 18°C at night.

How sunny is it in Lisbon in August?

There are normally 11 hours of bright sunshine each day in Lisbon in August - that's 80% of daylight hours.

How warm is the sea around Lisbon in August?

The average sea temperature around Lisbon in August is 19°C.

Does it ever rain in Lisbon in August?

There are usually 2 days with some rain in Lisbon in August and the average monthly rainfall is 5mm.

Lisbon August sunrise & sunset times

Browse the sunrise and sunset times for Lisbon in August 2025. Select a month to view Lisbon sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:38 19:47
Saturday, 16th August 2025 05:52 19:29
Sunday, 31st August 2025 06:05 19:08

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^