Current sea water temperature:
+57.0°F
| Minimum sea water temperature in May: | 68.4°F |
| Maximum sea water temperature in May: | 51.8°F |
| Average sea water temperature in May: | 59.7°F |
| more information | |
14 days
forecast
forecast
| Istanbul |
monthly
weather
weather
| Istanbul |
Sea water temperature for the last 10 days:
| May 16 | 57.0°F | May 11 | 58.8°F |
| May 15 | 57.2°F | May 10 | 57.2°F |
| May 14 | 59.4°F | May 9 | 55.4°F |
| May 13 | 58.6°F | May 8 | 55.4°F |
| May 12 | 58.6°F | May 7 | 54.3°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:
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: 07:03
May 17, sunday
0900
63°F
NE
13 mph
13 mph
1200
66°F
E
11 mph
11 mph
1500
68°F
SE
7 mph
7 mph
1800
64°F
S
13 mph
13 mph
2100
59°F
SE
3 mph
3 mph
May 18, monday
0000
59°F
SE
9 mph
9 mph
0300
55°F
SE
4 mph
4 mph
0600
55°F
SE
4 mph
4 mph
