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Istanbul Weather Forecast
18 August 2026
5-day weather forecast
Today
25°SunnyWednesday
29°SunnyThursday
32°SunnyFriday
28°SunnySaturday
27°Sunny
The Istanbul weather page includes hourly, daily, and 5-day weather forecasts for rain, sun, wind, humidity, and temperature.
The weather forecast for Istanbul on Tuesday,18 August 2026, is as follows: Temperature 25°C, humidity 49%, wind speed 9 km/h, and expected to be Sunny.
The weather forecast for Istanbul tomorrow is as follows: Temperature 29°C, with expected Sunny.
The Meteorology General Directorate's weather forecast for Istanbul, including temperature, humidity, wind, and weather conditions, is updated in real-time for today, tomorrow, and the next 5 days for all provinces in Istanbul and Türkiye. You can use other links to access the weather forecast table for other cities.
Phases of the Moon
Istanbul
18 August 2026 - 31 August 2026
Waxing Crescent
- % 30 -
Waxing Crescent
19 August Wednesday
13:38
First Quarter
20 August Thursday
14:41
Waxing Gibbous
21 August Friday
15:42
Waxing Gibbous
22 August Saturday
16:36
August Moon Phase Calendar
Moon Phases in Istanbul: 18 August 2026 Tuesday, the moon in Istanbul is observed in the Waxing Crescent phase. You can find the 14-day moon phases for Istanbul on the Yeni Şafak weather page. Daily moon phases are updated hourly with current data. You can follow the most current and accurate information on Istanbul weather and moon phases from Yeni Şafak.