Weather in Istanbul in August 2025
- August is usually the hottest month of the year in Istanbul;
Average weather
Average temperature in Istanbul in August
Going from a maximum of +91°F during the day to a minimum of +70°F during the night, the temperature in August averages around +84°F.
The average maximum temperature goes up 17% by the end of the month, compared with the beginning of the month, from +82°F to +86°F.
Is Istanbul warm or cold in August?
Istanbul is typically warm in August.
Maximum temperatures go up compared to the previous month from +81°F to +82°F. The minimum temperature also goes up from +70°F to +72°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in Istanbul, here is the comparison with other months:
Water temperature in Istanbul in August
Water in Istanbul in August is Comfortable. It varies from +73°F to +81°F, with an average of +77°F. This is almost similar to the air temperature, which averages +82°F.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Istanbul in August?
Climate in Istanbul in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +81°F | +82°F | +75°F | ||||
| Min. temperature | ||||||
| +59°F | +61°F | +54°F | ||||
| Max. temperature | ||||||
| +97°F | +95°F | +97°F | ||||
| Rainfall | ||||||
| 18 mm | 14 mm | 31 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +76°F | +77°F | +73°F | ||||
| Humidity | ||||||
| 64% | 66% | 67% | ||||
| Air pressure | ||||||
| 1011 HPa | 1012 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 22 | 22 | 17 | ||||
| Cloudy days | ||||||
| 2 | 3 | 5 | ||||
| Rainy days | ||||||
| 5 | 5 | 6 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as great as in July. It’s getting warmer as August arrives. The average maximum temperature goes up from +81°F to +82°F during the day. As August arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 18 mm to 14 mm. Humidity rises from 64% to 66%. The average wind speed doesn’t change much during August, staying around 4 m/s. The amount of sunny days stay about the same, averaging 22 sunny days during the month.
September brings much the same weather, it remains great.
Wind
The average wind speed is 5 m/s getting up to 9 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Istanbul is gradually decreasing during August, going from 4 m/s to 3 m/s over the course of the month.
Rain
How was the weather last August in Istanbul?
Climate Change Over the Years
The climate in Istanbul in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1997 (+61°F) and the highest in 2019 (+68°F). The driest year was 1984 with only 361 mm of rainfall, and the wettest year was 2010 with 859 mm.
FAQ
Is August a good time to visit Istanbul?
Can you sunbathe in Istanbul in August?
Can you swim in Istanbul in August?
Is Istanbul rainy in August?
Is it sunny in Istanbul in August?
Other cities in Turkey
Monthly weather in Istanbul
Source of the data
For this page, we’ve looked at the typical weather in Istanbul, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.