What is the current water temperature in Istanbul?

Q: What is the current water temperature in Istanbul?

As of now, in Istanbul, the water temperature is 8.44°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

Turkey > Istanbul

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.

47.2

°F

March 21, 17:47

Trend:

stable

Yesterday:

47.4°F

Tomorrow:

47.3°F

Sunrise:

07:07

Sunset:

19:17

Day Length:

12 h. 10 min.

Istanbul in March

Minimum:

48.0°F

Average:

51.4°F

Maximum:

55.0°F

Sea water temperature in Istanbul today

As of now, in Istanbul, the water temperature is 47.2°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.1°F lower 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

Today's water temperature closely matches the previous two weeks' average, indicating a stable 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 49.7°F on 2025, while the historical minimum was 45.1°F on 2022.

latest data

last year

Over the last two weeks, the water temperature has stayed slightly lower than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 47.4°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Istanbul

Date	Current Year actual* / forecast**	last year	10 years average
Mar 7	46.9°F	46.8°F	47.8°F
Mar 8	46.8°F	47.6°F	48.1°F
Mar 9	47.7°F	47.4°F	48.1°F
Mar 10	47.3°F	47.1°F	48.2°F
Mar 11	47.3°F	46.9°F	48.0°F
Mar 12	47.2°F	49.1°F	48.2°F
Mar 13	46.9°F	47.8°F	48.2°F
Mar 14	47.4°F	48.9°F	48.3°F
Mar 15	47.2°F	49.4°F	48.4°F
Mar 16	46.6°F	49.6°F	48.1°F
Mar 17	45.9°F	49.4°F	48.1°F
Mar 18	47.2°F	51.7°F	48.5°F
Mar 19	46.9°F	51.2°F	48.3°F
Mar 20	47.4°F	49.9°F	48.2°F
Mar 21	47.2°F	49.7°F	48.3°F
Mar 22	47.3°F	49.2°F	48.5°F
Mar 23	47.1°F	48.7°F	48.2°F
Mar 24	47.3°F	50.5°F	48.4°F
Mar 25	47.4°F	50.4°F	48.6°F
Mar 26	47.6°F	50.6°F	48.7°F
Mar 27	47.6°F	50.6°F	48.7°F
Mar 28	47.9°F	50.6°F	49.0°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, 53.4°F in Spring, 73.2°F in Summer, and 67.2°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Üsküdar	46.8°F	3mi
Esenler	47.5°F	4mi
Bahçelievler	47.5°F	5mi
Bağcılar	47.5°F	5mi
Sultangazi	46.0°F	8mi
Umraniye	46.6°F	9mi
Maltepe	48.5°F	12mi
Yalova	49.4°F	30mi
Bursa	49.4°F	57mi

* current water temperature in this city

** straight line distance from Istanbul