Porto weather in September 2025

Expect 24°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Porto in September. Check more long-term weather averages for Porto in September before you book your next holiday to Portugal in 2025/2026.

  • 24°C maximum daytime temperature in September in Porto24
    24°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Porto8
    8 days with some rainfall
  • 14°C minimum night-time temperature in September in Porto14
    14°C min night temperature
  • 12 hours of daylight per day in September in Porto12
    12 hours of daylight per day
  • No heat & humidity in September in Porto0
    No heat & humidity
  • 62 mm monthly rainfall in September in Porto62
    62 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Porto6
    6 (High) UV index
  • 18°C sea temperature in September in Porto18
    18°C sea temperature

More about Porto

Porto by month

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

Recommended for Portugal

Jet2holidays: Top discounted 2025/2026 holidays

  • Save on package holidays in 2025/2026 with Jet2holidays
  • Explore top discounted holidays & exclusive offers
  • Including hotel deals, free child places & singles discount
Go to Jet2holidays deal >>

View all Jet2holidays offers

Jet2holidaysJet2holidays deal finder

The September weather guide for Portugal (Porto) 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 Porto in September?

Daytime temperatures usually reach 24°C in Porto in September, falling to 14°C at night.

How sunny is it in Porto in September?

There are normally 8 hours of bright sunshine each day in Porto in September - that's 60% of daylight hours.

How warm is the sea around Porto in September?

The average sea temperature around Porto in September is 18°C.

Does it rain in Porto in September?

There are usually 8 days with some rain in Porto in September and the average monthly rainfall is 62mm.

Porto September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:01 19:07
Monday, 15th September 2025 06:15 18:43
Tuesday, 30th September 2025 06:30 18:18

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^