Olhao weather in September 2025

Expect 81°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Olhao in September. Check more long-term weather averages for Olhao in September before you book your next holiday to Algarve in 2025/2026.

  • 81°F maximum daytime temperature in September in Olhao81
    81°F max day temperature
  • 9 hours of sunshine per day
  • 2 days with some rainfall in September in Olhao2
    2 days with some rainfall
  • 63°F minimum night-time temperature in September in Olhao63
    63°F min night temperature
  • 12 hours of daylight per day in September in Olhao12
    12 hours of daylight per day
  • Low heat & humidity in September in OlhaoL
    Low heat & humidity
  • 0.6 inches monthly rainfall in September in Olhao0.6
    0.6 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Olhao7
    7 (High) UV index
  • 70°F sea temperature in September in Olhao70
    70°F sea temperature

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The September weather guide for Algarve (Olhao) 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)  |  Imperial (°F)

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More about the Algarve

How hot is it in Olhao in September?

Daytime temperatures usually reach 81°F in Olhao in September with low heat and humidity, falling to 63°F at night.

How sunny is it in Olhao in September?

There are normally 9 hours of bright sunshine each day in Olhao in September - that's 72% of daylight hours.

How warm is the sea around Olhao in September?

The average sea temperature around Olhao in September is 70°F.

Does it ever rain in Olhao in September?

There are usually 2 days with some rain in Olhao in September and the average monthly rainfall is 0.6 inches.

Olhao September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:02 19:00
Monday, 15th September 2025 06:14 18:39
Tuesday, 30th September 2025 06:26 18:16

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