Istanbul weather in April
Temperature, sea and sunshine in April: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in April
Good
Best time to visit: May – September
What is the weather like in Istanbul in April?
In April, Istanbul is cool: daytime highs average 15 °C, and nights cool down to about 9 °C. The sea averages 11.6 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain falls on about 9 days, adding up to 50 mm. All in all, April is a good month for a holiday in Istanbul.
April compared
How the weather changes from March to May. Tap a month to open it.
More details for April
- Daylight
- 13 h 16 min06:27 – 19:42
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 20 km/haverage daily peak
- Cloud cover
- 53 %on average
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+3Europe/Istanbul
How the score comes together
- Temperatureweight 50 %70 %
- Sunshineweight 20 %63 %
- Few rainy daysweight 30 %66 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in April
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Istanbul in April: quick answers
Is Istanbul hot in April?
No. In April, Istanbul is cool: daytime highs average 15 °C and nights drop to about 9 °C.
Can you swim in Istanbul in April?
Only if you don't mind cold water: in April the sea averages just 11.6 °C. Comfortable swimming is possible from June to September.
Does it rain much in Istanbul in April?
Rain falls on about 9 days, adding up to 50 mm.
Istanbul month by month
The whole year in IstanbulAll destinations: TurkeyWhere to go in AprilSea temperature in April
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)