30.12
tue
tue
Day
50°F
NE 19 mph
Precip.
0%
0%
Night
41°F
S 13 mph
Precip.
100%
100%
31.12
wed
wed
Day
39°F
SE 14 mph
Precip.
0%
0%
Night
34°F
SE 9 mph
Precip.
0%
0%
01.01
thu
thu
Day
36°F
SE 12 mph
Precip.
0%
0%
Night
36°F
N 6 mph
Precip.
0%
0%
02.01
fri
fri
Day
41°F
N 11 mph
Precip.
0%
0%
Night
45°F
N 13 mph
Precip.
0%
0%
03.01
sat
sat
Day
50°F
NE 14 mph
Precip.
0%
0%
Night
52°F
NE 16 mph
Precip.
0%
0%
04.01
sun
sun
Day
57°F
NE 17 mph
Precip.
0%
0%
Night
54°F
N 12 mph
Precip.
0%
0%
05.01
mon
mon
Day
55°F
N 13 mph
Precip.
0%
0%
Night
54°F
N 9 mph
Precip.
0%
0%
sea water
temperature
temperature
| Istanbul |
monthly
weather
weather
| Istanbul |
current
weather
weather
| Istanbul |
14 days
forecast
forecast
| Istanbul |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 57.1°F. The highest and lowest sea temperatures during the month were 60.4°F and 53.6°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 50.5°F. The highest and lowest sea temperatures during the month were 52.3°F and 49.3°F.
Air temperature in Istanbul, °F
Precipitation total in Istanbul, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Istanbul
Istanbul on a weather map
Places in Turkey:
Name
°F
24 Hours Forecast
Istanbul
Local time: 23:38
December 31, wednesday
0000
41°F
S
13 mph
13 mph
0300
43°F
SE
13 mph
13 mph
0600
39°F
SE
14 mph
14 mph
0900
39°F
S
16 mph
16 mph
1200
39°F
SE
14 mph
14 mph
1500
37°F
S
11 mph
11 mph
1800
37°F
SE
8 mph
8 mph
2100
36°F
SE
9 mph
9 mph
