Current sea water temperature:
+50.9°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: | 49.2°F |
| more information | |
14 days
forecast
forecast
| Istanbul |
monthly
weather
weather
| Istanbul |
Sea water temperature for the last 10 days:
| January 15 | 50.9°F | January 10 | 52.5°F |
| January 14 | 51.1°F | January 9 | 52.0°F |
| January 13 | 51.6°F | January 8 | 52.5°F |
| January 12 | 52.0°F | January 7 | 53.1°F |
| January 11 | 52.5°F | January 6 | 51.1°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: 17:10
January 15, thursday
1800
50°F
NE
9 mph
9 mph
2100
50°F
NE
6 mph
6 mph
January 16, friday
0000
48°F
E
6 mph
6 mph
0300
48°F
SE
2 mph
2 mph
0600
46°F
SW
2 mph
2 mph
0900
48°F
S
2 mph
2 mph
1200
50°F
S
3 mph
3 mph
1500
48°F
SW
11 mph
11 mph
