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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 max day temperature
27 - 10 hours of sunshine per day
- 5 days with some rainfall
5 - 18°C min night temperature
18 - 14 hours of daylight per day
14 - Low heat & humidity
L - 35 mm of monthly rainfall
35 - 8 (Very High) UV index
8 - 24°C sea temperature
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Recommended for Turkey
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)
More about Turkey
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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