17.05
sun
sun
Day
66°F
E 11 mph
Precip.
100%
100%
Night
59°F
SE 9 mph
Precip.
100%
100%
18.05
mon
mon
Day
63°F
NE 6 mph
Precip.
87%
87%
Night
59°F
W 2 mph
Precip.
0%
0%
19.05
tue
tue
Day
70°F
W 8 mph
Precip.
0%
0%
Night
61°F
SW 9 mph
Precip.
0%
0%
20.05
wed
wed
Day
68°F
SW 14 mph
Precip.
0%
0%
Night
63°F
SE 4 mph
Precip.
100%
100%
21.05
thu
thu
Day
64°F
S 12 mph
Precip.
74%
74%
Night
61°F
E 6 mph
Precip.
100%
100%
22.05
fri
fri
Day
66°F
S 8 mph
Precip.
0%
0%
Night
64°F
S 4 mph
Precip.
0%
0%
23.05
sat
sat
Day
64°F
S 12 mph
Precip.
100%
100%
Night
61°F
S 3 mph
Precip.
0%
0%
24.05
sun
sun
Day
63°F
SE 12 mph
Precip.
100%
100%
Night
61°F
E 6 mph
Precip.
100%
100%
25.05
mon
mon
Day
66°F
S 4 mph
Precip.
100%
100%
Night
61°F
SW 4 mph
Precip.
0%
0%
26.05
tue
tue
Day
66°F
S 7 mph
Precip.
100%
100%
Night
63°F
SW 9 mph
Precip.
0%
0%
27.05
wed
wed
Day
72°F
SW 9 mph
Precip.
0%
0%
Night
63°F
SW 11 mph
Precip.
0%
0%
28.05
thu
thu
Day
68°F
SW 6 mph
Precip.
89%
89%
Night
63°F
SW 4 mph
Precip.
73%
73%
29.05
fri
fri
Day
70°F
NE 4 mph
Precip.
0%
0%
Night
64°F
SW 7 mph
Precip.
0%
0%
30.05
sat
sat
Day
72°F
SW 6 mph
Precip.
0%
0%
Night
64°F
SW 14 mph
Precip.
0%
0%
sea water
temperature
temperature
| Istanbul |
monthly
weather
weather
| Istanbul |
current
weather
weather
| Istanbul |
7 days
forecast
forecast
| Istanbul |
Sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 55.7°F. The highest and lowest sea temperatures during the month were 59.4°F and 52.9°F.
Air temperature in Istanbul, °F
Precipitation total in Istanbul, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Istanbul
Istanbul on a weather map
Places in Turkey:
Name
°F
24 Hours Forecast
Istanbul
Local time: 07:51
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
