Measurements:
°C
°F
CURRENT WEATHER
09:50
Istanbul
62°F
NE 11 mph
Feels like: 62°F
Precip: 6%
World Resorts Turkey Istanbul Weather

7 Day Weather Forecast

10.19
mon
DAY
64°F
NE 12 mph
precip
10%
NIGHT
62°F
N 3 mph
precip
14%
10.20
tue
DAY
68°F
W 4 mph
precip
2%
NIGHT
62°F
W 7 mph
precip
7%
10.21
wed
DAY
68°F
W 6 mph
precip
5%
NIGHT
62°F
SW 6 mph
precip
22%
10.22
thu
DAY
68°F
W 4 mph
precip
3%
NIGHT
64°F
SW 8 mph
precip
24%
10.23
fri
DAY
66°F
SW 8 mph
precip
20%
NIGHT
62°F
SW 6 mph
precip
13%
10.24
sat
DAY
68°F
W 6 mph
precip
5%
NIGHT
62°F
SW 7 mph
precip
27%
10.25
sun
DAY
68°F
N 4 mph
precip
5%
NIGHT
66°F
W 1 mph
precip
5%

Istanbul Sea Water Temperature in October, °F

Select Year: 2026 2025 2024

The average sea surface temperature in October 2026 for Istanbul was 19.7°F. The maximum and minimum values were 18.1°F and 20.6°F respectively.

Istanbul on the Weather Map

Best Time to Visit Istanbul
The most sunny months:
July 28 days
August 28 days
June 23 days
The most warm months:
July 88.7 °F
August 88.4 °F
June 83.1 °F
Warmest sea temperature:
August 78.6 °F
July 77.1 °F
September 76.0 °F
The most cold months:
January 48.5 °F
February 49.8 °F
December 53.2 °F
The most rainy months:
January 5 days
December 4 days
February 3 days
The most windy months:
August 13 mph
July 12 mph
September 12 mph
more details