All data are in degrees Fahrenheit

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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

69.9

°F

June 23, 16:38

Trend:

increasing

Yesterday:

69.1°F

Tomorrow:

70.2°F

Sunrise:

05:32

Sunset:

20:40

Day Length:

15 h. 8 min.

Istanbul in June

Minimum:

47.5°F

Average:

51.2°F

Maximum:

52.9°F

Sea water temperature in Istanbul today

As of now, in Istanbul, the water temperature is 69.9°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 1.5°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. 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 74.7°F on 2016, while the historical minimum was 68.4°F on 2025.

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 70.8°F, with minimum temperature starting at 70.2°F, while the maximum might reach 71.5°F.

Daily water temperature in Istanbul

Date Current Year

actual* / forecast**

last year 10 years average
Jun 9 68.5°F 66.2°F 67.7°F
Jun 10 67.8°F 67.9°F 68.1°F
Jun 11 68.6°F 67.4°F 68.6°F
Jun 12 69.2°F 67.9°F 68.8°F
Jun 13 69.5°F 68.0°F 69.2°F
Jun 14 68.8°F 68.4°F 69.6°F
Jun 15 69.1°F 67.9°F 69.6°F
Jun 16 67.8°F 68.1°F 69.5°F
Jun 17 69.1°F 68.8°F 69.7°F
Jun 18 69.5°F 69.8°F 70.2°F
Jun 19 69.7°F 70.9°F 70.5°F
Jun 20 68.9°F 71.5°F 70.4°F
Jun 21 68.9°F 71.9°F 71.0°F
Jun 22 69.1°F 69.5°F 71.0°F
Jun 23 69.9°F 68.4°F 71.4°F
Jun 24 70.2°F 68.4°F 71.7°F
Jun 25 70.4°F 68.9°F 71.9°F
Jun 26 70.7°F 69.0°F 72.2°F
Jun 27 70.9°F 70.7°F 72.4°F
Jun 28 71.1°F 71.1°F 72.6°F
Jun 29 71.5°F 71.9°F 73.0°F
Jun 30 70.9°F 69.6°F 72.4°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 1, 2018, reaching a 79.6°F. While the coldest temperature occurred on February 21, 2017, dipping to 42.7°F. The average readings by season are 50.7°F in Winter, 53.3°F in Spring, 73.2°F in Summer, and 67.2°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Üsküdar 68.8°F 3mi
Esenler 70.9°F 4mi
Bahçelievler 70.9°F 5mi
Bağcılar 70.9°F 5mi
Sultangazi 71.5°F 8mi
Umraniye 69.2°F 9mi
Maltepe 69.2°F 12mi
Yalova 69.3°F 30mi
Bursa 71.6°F 57mi

* current water temperature in this city

** straight line distance from Istanbul