Average monthly water temperature in Istanbul, Turkey
On this page you find the mean water temperature over the year in Istanbul (the Marmara Region), Turkey. Get insights into the water temperature fluctuations and discover what they mean for visitors.
Istanbul experiences water temperature shifts throughout the year. The warmest month, July, reaches an average of 25°C (77°F).
The coldest month, February, averages 8°C (46°F). Visitors during these months can leave their swimming gear at home.
Istanbul Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Istanbul - and find the best time to visit.
Istanbul 3-Day Forecast
Temperature Rainfall Sunshine Water Temp
See the full Istanbul climate overview or explore weather in Turkey.
Popular this month
Where to go in September - average daytime high across popular destinations.
Antalya
31°C (88°F) Side
30°C (86°F) Fethiye30°C (86°F) Oludeniz30°C (86°F) Alanya28°C (82°F) Alacati
26°C (79°F) Istanbul25°C (77°F) Trabzon
23°C (73°F) 
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