Current sea water temperature:
+53.2°F
| Minimum sea water temperature in April: | 59.4°F |
| Maximum sea water temperature in April: | 45.7°F |
| Average sea water temperature in April: | 51.6°F |
| more information | |
14 days
forecast
forecast
| Istanbul |
monthly
weather
weather
| Istanbul |
Sea water temperature for the last 10 days:
| April 26 | 53.2°F | April 21 | 52.2°F |
| April 25 | 51.4°F | April 20 | 51.3°F |
| April 24 | 51.1°F | April 19 | 50.7°F |
| April 23 | 51.8°F | April 18 | 50.7°F |
| April 22 | 52.3°F | April 17 | 50.9°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
May
May
| Istanbul |
Best time for vacation in Istanbul
Istanbul on a weather map
Places in Turkey:
Name
°F
24 Hours Forecast
Istanbul
Local time: 01:20
April 27, monday
0300
54°F
SW
22 mph
22 mph
0600
52°F
SW
18 mph
18 mph
0900
54°F
SW
18 mph
18 mph
1200
57°F
SW
18 mph
18 mph
1500
59°F
SW
19 mph
19 mph
1800
55°F
SW
19 mph
19 mph
2100
50°F
SW
16 mph
16 mph
April 28, tuesday
0000
50°F
SW
14 mph
14 mph
