Portugal weather in May 2025

Expect 22°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Portugal in May. Check more long-term weather averages for Portugal in May before you book your next holiday to Portugal in 2025/2026.

  • 22°C maximum daytime temperature in May in Portugal (Lisbon)22
    22°C max day temperature
  • 9 hours of sunshine per day
  • 8 days with some rainfall in May in Portugal (Lisbon)8
    8 days with some rainfall
  • 13°C minimum night-time temperature in May in Portugal (Lisbon)13
    13°C min night temperature
  • 14 hours of daylight per day in May in Portugal (Lisbon)14
    14 hours of daylight per day
  • No heat & humidity in May in Portugal (Lisbon)0
    No heat & humidity
  • 39 mm monthly rainfall in May in Portugal (Lisbon)39
    39 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Portugal (Lisbon)8
    8 (Very High) UV index
  • 16°C sea temperature in May in Portugal (Lisbon)16
    16°C sea temperature

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The May 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.

Top Portugal destinations

Below are average maximum temperatures at popular countries, regions and places in Portugal in May. Select a holiday destination to see more weather parameters.

All Portugal regions

All Portugal destinations

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

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More about Portugal

How hot is it in Portugal in May?

Daytime temperatures usually reach 22°C in Lisbon, Portugal in May, falling to 13°C at night.

How sunny is it in Portugal in May?

There are normally 9 hours of bright sunshine each day in Lisbon, Portugal in May - that's 66% of daylight hours.

How warm is the sea around Portugal in May?

The average sea temperature around Lisbon, Portugal in May is 16°C.

Does it rain in Portugal in May?

There are usually 8 days with some rain in Lisbon, Portugal in May and the average monthly rainfall is 39mm.

Portugal May sunrise & sunset times

Browse the sunrise and sunset times for Portugal in May 2025. Select a month to view Portugal sunrise and sunset times for the next 12 months. The Portugal sunrise and sunset times shown below are for Lisbon.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:39 19:29
Friday, 16th May 2025 05:24 19:43
Saturday, 31st May 2025 05:14 19:55

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