Measurements:
°C
°F
CURRENT WEATHER
15:57
Istanbul
74°F
NE 6 mph
Feels like: 74°F
Precip: 0%
World Resorts Turkey Istanbul Weather

7 Day Weather Forecast

05.11
mon
DAY
72°F
N 5 mph
precip
0%
NIGHT
64°F
NE 3 mph
precip
70%
05.12
tue
DAY
72°F
NE 9 mph
precip
0%
NIGHT
66°F
NE 7 mph
precip
0%
05.13
wed
DAY
66°F
S 11 mph
precip
0%
NIGHT
56°F
W 9 mph
precip
0%
05.14
thu
DAY
66°F
SW 10 mph
precip
100%
NIGHT
56°F
SW 6 mph
precip
0%
05.15
fri
DAY
64°F
N 4 mph
precip
0%
NIGHT
60°F
W 5 mph
precip
0%
05.16
sat
DAY
70°F
NW 4 mph
precip
0%
NIGHT
60°F
SW 2 mph
precip
100%
05.17
sun
DAY
64°F
SE 11 mph
precip
77%
NIGHT
58°F
S 6 mph
precip
0%

Istanbul Sea Water Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Istanbul was 13.9°F. The maximum and minimum values were 11.0°F and 16.5°F respectively.

Istanbul on the Weather Map

Best Time to Visit Istanbul
The most sunny months:
July 28 days
August 28 days
June 22 days
The most warm months:
July 88.9 °F
August 88.5 °F
June 83.1 °F
Warmest sea temperature:
August 78.7 °F
July 77.3 °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 14 mph
July 12 mph
September 12 mph
more details