Current Sea Water Temperature:
+66.2°F
| Maximum Sea Water Temperature in October: | 75.8°F |
| Minimum Sea Water Temperature in October: | 59.8°F |
| Average water temperature in October: | 68.6°F |
| detailed information | |
Sea Water Temperature for the Last 10 Days:
| October 18 | 66.2°F | October 13 | 70.6°F |
| October 17 | 67.2°F | October 12 | 69.8°F |
| October 16 | 68.4°F | October 11 | 69.4°F |
| October 15 | 69.6°F | October 10 | 69.4°F |
| October 14 | 70.4°F | October 09 | 69.2°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 76.3°F. The maximum and minimum values were 71.4°F and 78.4°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 2026 for Istanbul was 75.1°F. The maximum and minimum values were 71.0°F and 78.2°F respectively.
Turkey Resorts:
NAME
F°
| Alanya |  |
+68 |
| Antalya | |
+62 |
| Avsallar | |
+68 |
| Beldibi | |
+66 |
| Belek | |
+64 |
| Bodrum | |
+64 |
| Camyuva | |
+66 |
| Fethiye | |
+66 |
| Istanbul |  |
+62 |
| Kas | |
+64 |
| Kemer | |
+66 |
| Kusadasi | |
+58 |
| Marmaris | |
+62 |
| Okurcalar | |
+68 |
| Side | |
+66 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Istanbul
Local time: 07:36
19 oct, monday
| 0900 |  |
62°F | NE 11 mph |
| 1200 |  |
64°F | NE 12 mph |
| 1500 |  |
62°F | NE 8 mph |
| 1800 | |
64°F | NE 5 mph |
| 2100 | |
62°F | N 3 mph |
20 oct, tuesday
| 0000 | |
62°F | N 3 mph |
| 0300 |  |
62°F | NW 3 mph |
| 0600 | |
60°F | NW 3 mph |