Istanbul weather in August 2025

Expect 27°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Istanbul in August. Check more long-term weather averages for Istanbul in August before you book your next holiday to Turkey in 2025/2026.

  • 27°C maximum daytime temperature in August in Istanbul27
    27°C max day temperature
  • 10 hours of sunshine per day
  • 5 days with some rainfall in August in Istanbul5
    5 days with some rainfall
  • 18°C minimum night-time temperature in August in Istanbul18
    18°C min night temperature
  • 14 hours of daylight per day in August in Istanbul14
    14 hours of daylight per day
  • Low heat & humidity in August in IstanbulL
    Low heat & humidity
  • 35 mm monthly rainfall in August in Istanbul35
    35 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Istanbul8
    8 (Very High) UV index
  • 24°C sea temperature in August in Istanbul24
    24°C sea temperature

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The August weather guide for Turkey (Istanbul) 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)

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How hot is it in Istanbul in August?

Daytime temperatures usually reach 27°C in Istanbul in August with low heat and humidity, falling to 18°C at night.

How sunny is it in Istanbul in August?

There are normally 10 hours of bright sunshine each day in Istanbul in August - that's 75% of daylight hours.

How warm is the sea around Istanbul in August?

The average sea temperature around Istanbul in August is 24°C.

Does it rain in Istanbul in August?

There are usually 5 days with some rain in Istanbul in August and the average monthly rainfall is 35mm.

Istanbul August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:00 20:20
Saturday, 16th August 2025 06:15 20:01
Sunday, 31st August 2025 06:30 19:38

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