Current sea water temperature:
+53.2°F
| Minimum sea water temperature in January: | 54.1°F |
| Maximum sea water temperature in January: | 44.1°F |
| Average sea water temperature in January: | 49.1°F |
| more information | |
14 days
forecast
forecast
| Istanbul |
monthly
weather
weather
| Istanbul |
Sea water temperature for the last 10 days:
| January 1 | 53.2°F | December 27 | 53.6°F |
| December 31 | 54.0°F | December 26 | 53.8°F |
| December 30 | 54.1°F | December 25 | 54.1°F |
| December 29 | 54.3°F | December 24 | 54.7°F |
| December 28 | 55.2°F | December 23 | 55.0°F |
Monthly sea water temperature, °F
When is the warmest sea in Istanbul?
Based on the data about daily sea water temperature for the last three years the warmest sea in Istanbul was noticed in August, July and September.
Monthly Sea Temperatures in Istanbul, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 73.9°F. The highest and lowest sea temperatures during the month were 76.3°F and 70.3°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 72.9°F. The highest and lowest sea temperatures during the month were 75.9°F and 69.3°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 73.7°F. The highest and lowest sea temperatures during the month were 76.3°F and 71.4°F.
current
weather
weather
| Istanbul |
weather in
January
January
| Istanbul |
Best time for vacation in Istanbul
Istanbul on a weather map
Places in Turkey:
Name
°F
24 Hours Forecast
Istanbul
Local time: 14:57
January 01, thursday
1500
37°F
SE
11 mph
11 mph
1800
36°F
E
7 mph
7 mph
2100
36°F
NE
5 mph
5 mph
January 02, friday
0000
37°F
NE
11 mph
11 mph
0300
36°F
N
9 mph
9 mph
0600
36°F
N
8 mph
8 mph
0900
37°F
N
11 mph
11 mph
1200
43°F
N
12 mph
12 mph
