Current sea water temperature:
+72.7°F
| Minimum sea water temperature in September: | 78.4°F |
| Maximum sea water temperature in September: | 68.5°F |
| Average sea water temperature in September: | 73.4°F |
| more information | |
14 days
forecast
forecast
| Istanbul |
monthly
weather
weather
| Istanbul |
Sea water temperature for the last 10 days:
| September 14 | 72.7°F | September 9 | 73.4°F |
| September 13 | 72.7°F | September 8 | 74.7°F |
| September 12 | 73.0°F | September 7 | 75.4°F |
| September 11 | 72.5°F | September 6 | 75.0°F |
| September 10 | 72.9°F | September 5 | 74.3°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:
2026
2025
2024
The average sea water temperature in August of 2026 was 73.6°F. The highest and lowest sea temperatures during the month were 75.6°F and 69.3°F.
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 72.4°F. The highest and lowest sea temperatures during the month were 73.9°F and 70.3°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
September
September
| Istanbul |
Best time for vacation in Istanbul
Istanbul on a weather map
Places in Turkey:
Name
°F
24 Hours Forecast
Istanbul
Local time: 01:42
September 15, tuesday
0300
66°F
W
6 mph
6 mph
0600
66°F
SW
6 mph
6 mph
0900
68°F
SW
7 mph
7 mph
1200
73°F
SW
13 mph
13 mph
1500
73°F
SW
17 mph
17 mph
1800
72°F
SW
17 mph
17 mph
2100
70°F
SW
15 mph
15 mph
September 16, wednesday
0000
68°F
SW
11 mph
11 mph
