15.09
tue
tue
Day
73°F
SW 14 mph
Precip.
11%
11%
Night
68°F
SW 12 mph
Precip.
13%
13%
16.09
wed
wed
Day
72°F
SW 15 mph
Precip.
11%
11%
Night
64°F
SW 11 mph
Precip.
22%
22%
17.09
thu
thu
Day
72°F
SW 7 mph
Precip.
16%
16%
Night
66°F
S 11 mph
Precip.
79%
79%
18.09
fri
fri
Day
75°F
SW 8 mph
Precip.
10%
10%
Night
68°F
SW 7 mph
Precip.
8%
8%
19.09
sat
sat
Day
75°F
SW 8 mph
Precip.
2%
2%
Night
70°F
SW 9 mph
Precip.
8%
8%
20.09
sun
sun
Day
77°F
SW 14 mph
Precip.
2%
2%
Night
72°F
SW 10 mph
Precip.
12%
12%
21.09
mon
mon
Day
79°F
SW 11 mph
Precip.
10%
10%
Night
72°F
W 7 mph
Precip.
5%
5%
sea water
temperature
temperature
| Istanbul |
monthly
weather
weather
| Istanbul |
current
weather
weather
| Istanbul |
14 days
forecast
forecast
| Istanbul |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 74.0°F. The highest and lowest sea temperatures during the month were 75.4°F and 72.5°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: 17:03
September 15, tuesday
1800
72°F
SW
16 mph
16 mph
2100
68°F
SW
12 mph
12 mph
September 16, wednesday
0000
68°F
SW
12 mph
12 mph
0300
68°F
SW
11 mph
11 mph
0600
68°F
SW
12 mph
12 mph
0900
70°F
SW
12 mph
12 mph
1200
72°F
SW
15 mph
15 mph
1500
70°F
SW
14 mph
14 mph
