World Resorts Turkey Istanbul Weather

Istanbul Sea Temperature in December

Average sea water temperature in December:
+53.7°F
Minimum sea water temperature in December: 61.2°F
Maximum sea water temperature in December: 48.4°F

Daily sea water temperature in December, °F

Show year:
2025
2024
2023

The average sea water temperature in December of 2025 was 57.0°F. The highest and lowest sea temperatures during the month were 60.4°F and 53.6°F.

Monthly sea water temperature in Istanbul, °F

Which Turkey resorts have warmest sea in December?

Place name December 2025 December 2024
Aydincik 70.8°F 68.2°F
Turkler 70.6°F 68.3°F
Alanya 70.6°F 68.4°F
Obagol 70.6°F 68.4°F
Avsallar 70.6°F 68.3°F
Konakli 70.6°F 68.3°F
Gazipasa 70.6°F 68.3°F
Bogazkent 70.5°F 68.1°F
Mahmutlar 70.5°F 68.3°F
Okurcalar 70.4°F 68.1°F
Incekum 70.4°F 68.1°F
Kalkan 70.4°F 68.2°F
Arsuz 70.4°F 68.1°F
Demre 70.4°F 68.2°F
Kargicak 70.4°F 68.2°F
Kundu 70.4°F 67.8°F
Finike 70.4°F 68.2°F
Kas 70.3°F 68.0°F
Tekirova 70.3°F 68.0°F
Colakli 70.3°F 68.0°F

Best time for vacation in Istanbul

Sunniest months:
July 28 days
August 28 days
June 22 days
Warmest months:
July 85.0 °F
August 84.7 °F
June 79.8 °F
Warmest sea temp:
August 75.8 °F
July 74.5 °F
September 73.4 °F
Coldest months:
January 48.7 °F
February 49.9 °F
December 52.9 °F
Rainiest months:
January 5 days
December 4 days
February 3 days
Windiest months:
August 13.7 mph
July 12.0 mph
September 11.9 mph

Istanbul on a weather map

Istanbul
+55°F
NE 27 mph
Feels like: +50°F
Precip.: 100%
Places in Turkey:
Name
°F
+63°F
+63°F
+59°F
+63°F
+57°F
+61°F
+57°F
+57°F
+57°F
+63°F
+61°F
+63°F
+63°F
+55°F
+55°F
24 Hours Forecast
Istanbul
Local time: 14:21
January 08, thursday
1500
55°F
NE
27 mph
1800
54°F
NE
22 mph
2100
48°F
E
12 mph
January 09, friday
0000
43°F
E
7 mph
0300
41°F
SW
5 mph
0600
39°F
S
6 mph
0900
41°F
S
3 mph
1200
41°F
N
5 mph
Units of measurement: °C / °F