Current Sea Water Temperature:
+76.6°F
| Maximum Sea Water Temperature in August: | 83.6°F |
| Minimum Sea Water Temperature in August: | 71.4°F |
| Average water temperature in August: | 78.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| August 19 | 76.6°F | August 14 | 77.2°F |
| August 18 | 76.0°F | August 13 | 77.8°F |
| August 17 | 75.6°F | August 12 | 77.4°F |
| August 16 | 76.0°F | August 11 | 77.4°F |
| August 15 | 76.0°F | August 10 | 76.8°F |
When is the Warmest Sea for Istanbul?
According to our data for the last three years for Istanbul the highest average sea water temperature was in August, July and September.
Average Water Temperature by Month, °F
Sea Water Temperature in August
The average sea surface temperature in August 2026 for Istanbul was 75.5°F. The maximum and minimum values were 71.4°F and 77.8°F respectively.
Sea Water Temperature in July
The average sea surface temperature in July 2026 for Istanbul was 74.9°F. The maximum and minimum values were 72.6°F and 76.6°F respectively.
Sea Water Temperature in September
The average sea surface temperature in September 2025 for Istanbul was 76.3°F. The maximum and minimum values were 73.8°F and 79.2°F respectively.
Turkey Resorts:
NAME
F°
| Alanya |  |
+86 |
| Antalya | |
+90 |
| Beldibi |  |
+90 |
| Belek | |
+88 |
| Bodrum | |
+86 |
| Camyuva | |
+90 |
| Fethiye | |
+84 |
| Goynuk | |
+90 |
| Istanbul | |
+86 |
| Kemer | |
+90 |
| Kusadasi | |
+84 |
| Marmaris | |
+88 |
| Okurcalar | |
+84 |
| Oludeniz | |
+84 |
| Side | |
+88 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Istanbul
Local time: 17:10
19 aug, wednesday
| 1800 |  |
86°F | SW 11 mph |
| 2100 |  |
82°F | SW 11 mph |
20 aug, thursday
| 0000 | |
80°F | W 5 mph |
| 0300 | |
80°F | SW 4 mph |
| 0600 | |
78°F | SW 5 mph |
| 0900 | |
84°F | W 5 mph |
| 1200 | |
92°F | SW 7 mph |
| 1500 | |
96°F | SW 14 mph |