All data are in degrees Fahrenheit


Water temperature in Istanbul

Detailed information about the current water temperature in Istanbul. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Istanbul now



June 20, 04:51











Day Length:

15 h. 8 min.

Istanbul in June







Sea water temperature in Istanbul today

As of now, in Istanbul, the water temperature is 71.6°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 1.3°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 73.3°F on 2019, while the historical minimum was 67.6°F on 2021.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 73.0°F, with minimum temperature starting at 72.1°F, while the maximum might reach 73.8°F.

Daily water temperature in Istanbul

Date Current Year

actual* / forecast**

last year 10 years average
Jun 6 69.9°F 64.3°F 66.5°F
Jun 7 71.3°F 64.4°F 66.9°F
Jun 8 70.5°F 64.7°F 67.1°F
Jun 9 70.3°F 64.8°F 67.4°F
Jun 10 70.4°F 65.0°F 68.0°F
Jun 11 70.7°F 65.0°F 68.5°F
Jun 12 72.0°F 66.1°F 68.7°F
Jun 13 72.8°F 66.5°F 69.2°F
Jun 14 74.7°F 66.7°F 69.8°F
Jun 15 73.0°F 66.6°F 70.0°F
Jun 16 70.9°F 67.2°F 70.0°F
Jun 17 70.2°F 68.2°F 70.1°F
Jun 18 71.0°F 68.3°F 70.6°F
Jun 19 71.9°F 68.5°F 70.6°F
Jun 20 71.6°F 67.7°F 70.3°F
Jun 21 72.1°F 69.5°F 70.9°F
Jun 22 72.3°F 69.9°F 71.0°F
Jun 23 72.7°F 70.0°F 71.4°F
Jun 24 73.0°F 71.3°F 71.7°F
Jun 25 73.3°F 71.3°F 72.1°F
Jun 26 73.7°F 72.1°F 72.5°F
Jun 27 73.8°F 71.8°F 72.5°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Istanbul by month

In Istanbul, the months July through September offer comfortable swimming conditions, which amounts to 80 swimming days.
The warmest water in Istanbul was recorded on August 17, 2014, reaching a 80.2°F. While the coldest temperature occurred on February 21, 2017, dipping to 42.7°F. The average readings by season are 50.4°F in Winter, 53.4°F in Spring, 73.4°F in Summer, and 66.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Üsküdar 69.9°F 3mi
Esenler 72.8°F 4mi
Bahçelievler 72.8°F 5mi
Bağcılar 72.8°F 5mi
Sultangazi 72.6°F 8mi
Umraniye 69.7°F 9mi
Maltepe 72.0°F 12mi
Yalova 72.6°F 30mi
Bursa 74.6°F 57mi

* current water temperature in this city

** straight line distance from Istanbul