Sea Temperature in Istanbul in December

Complete information on the sea temperature range in the Sea of Marmara in Istanbul in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in Istanbul. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in Istanbul in December

7°C

MINIMUN

11°C

AVERAGE

15°C

MAXIMUM

Historical Data of Water Temperature in December in Istanbul

Water Temperature Chart for Sea of Marmara in Istanbul in December

Sea Temperature Table in Istanbul in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	14°C	15°C	14°C	14.3°C
Dec 2	14°C	15°C	15°C	14.5°C
Dec 3	14°C	15°C	14°C	14.3°C
Dec 4	14°C	14°C	14°C	14.0°C
Dec 5	14°C	15°C	14°C	14.3°C
Dec 6	14°C	15°C	14°C	14.3°C
Dec 7	14°C	14°C	14°C	13.8°C
Dec 8	13°C	14°C	14°C	13.8°C
Dec 9	13°C	13°C	13°C	13.3°C
Dec 10	13°C	14°C	14°C	13.8°C
Dec 11	13°C	13°C	14°C	13.5°C
Dec 12	13°C	13°C	14°C	13.5°C
Dec 13	13°C	13°C	13°C	13.3°C
Dec 14	13°C	13°C	13°C	13.0°C
Dec 15	13°C	12°C	13°C	12.8°C
Dec 16	13°C	13°C	13°C	13.0°C
Dec 17	13°C	13°C	13°C	13.0°C
Dec 18	13°C	13°C	13°C	12.8°C
Dec 19	13°C	13°C	13°C	12.8°C
Dec 20	13°C	13°C	13°C	12.8°C
Dec 21	13°C	13°C	13°C	12.8°C
Dec 22	12°C	13°C	13°C	12.3°C
Dec 23	13°C	13°C	12°C	12.3°C
Dec 24	12°C	12°C	12°C	11.8°C
Dec 25	12°C	13°C	12°C	12.0°C
Dec 26	12°C	13°C	12°C	12.0°C
Dec 27	12°C	13°C	12°C	12.0°C
Dec 28	12°C	12°C	12°C	11.8°C
Dec 29	12°C	12°C	12°C	11.8°C
Dec 30	12°C	13°C	12°C	12.0°C

Istanbul Climate and Swimming Opportunities in December

12°C

Average Day Air Temperature

5°C

Average Night Air Temperature

109 mm

Precipitation Amount per Month

13 days

Number of Rainy Days

9 hrs

Daylight
per Day

4 hrs

Sunshine
per Day

11 km/h

Average Wind Speed

79%

Average
humidity

Istanbul lies within the Istanbul Province in Turkey. The average daytime temperature in Istanbul in December is 12°C (53°F), while the nighttime average is 5°C (42°F). There are typically 13 rainy days during the month, with a total precipitation of 109 mm (4.3 inches). The daylight duration in December in Istanbul is 9 hours, with an average of 4 hours of sunshine per day. The average wind speed in December is 11 km/h (7 mph), and the humidity level is around 79%.

The water temperature in Istanbul in December ranges from 11°C to 14°C (52°F to 57°F). At the beginning of the month, the average temperature is around 14°C (57°F), shifting to 13°C (55°F) by mid-December and reaching 12°C (54°F) in the last ten days. Overall, the average sea temperature in Istanbul for December is 13°C (55°F). The water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in Istanbul

What is the sea temperature in Istanbul in December?

The water temperature in the Sea of Marmara in Istanbul in December ranges from 11°C to 14°C (52°F to 57°F).

Is it possible to swim in the Sea of Marmara in Istanbul in December?

The average sea temperature in Istanbul in December is 13°C (55°F), and the air temperature is 12°C (53°F), so the water is cool, but many swimmers can tolerate it, especially with the sun out. Acclimatization is helpful.