14.09
mon
mon
Day
73°F
SE 8 mph
Precip.
15%
15%
Night
72°F
W 5 mph
Precip.
5%
5%
15.09
tue
tue
Day
73°F
E 5 mph
Precip.
4%
4%
Night
70°F
SW 6 mph
Precip.
17%
17%
16.09
wed
wed
Day
73°F
E 3 mph
Precip.
4%
4%
Night
72°F
NW 11 mph
Precip.
7%
7%
17.09
thu
thu
Day
75°F
N 19 mph
Precip.
65%
65%
Night
68°F
NW 13 mph
Precip.
67%
67%
18.09
fri
fri
Day
70°F
SW 2 mph
Precip.
40%
40%
Night
68°F
W 7 mph
Precip.
15%
15%
19.09
sat
sat
Day
70°F
W 4 mph
Precip.
11%
11%
Night
70°F
SW 7 mph
Precip.
6%
6%
20.09
sun
sun
Day
72°F
SE 9 mph
Precip.
5%
5%
Night
72°F
SW 6 mph
Precip.
7%
7%
21.09
mon
mon
Day
75°F
NW 2 mph
Precip.
3%
3%
Night
73°F
SW 5 mph
Precip.
5%
5%
22.09
tue
tue
Day
73°F
SE 8 mph
Precip.
5%
5%
Night
72°F
W 5 mph
Precip.
5%
5%
23.09
wed
wed
Day
68°F
W 15 mph
Precip.
60%
60%
Night
64°F
SW 27 mph
Precip.
4%
4%
24.09
thu
thu
Day
68°F
SW 16 mph
Precip.
1%
1%
Night
61°F
SW 11 mph
Precip.
9%
9%
25.09
fri
fri
Day
68°F
NW 5 mph
Precip.
3%
3%
Night
64°F
W 11 mph
Precip.
4%
4%
26.09
sat
sat
Day
64°F
NW 5 mph
Precip.
1%
1%
Night
61°F
W 9 mph
Precip.
3%
3%
27.09
sun
sun
Day
64°F
SW 9 mph
Precip.
1%
1%
Night
64°F
NW 3 mph
Precip.
1%
1%
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 74.8°F. The highest and lowest sea temperatures during the month were 76.5°F and 72.7°F.
Air temperature in Istria, °F
Precipitation total in Istria, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Istria
Istria on a weather map
Places in Croatia:
Name
°F
24 Hours Forecast
Istria
Local time: 13:27
September 14, monday
1500
73°F
SE
7 mph
7 mph
1800
75°F
SE
5 mph
5 mph
2100
73°F
S
6 mph
6 mph
September 15, tuesday
0000
72°F
W
5 mph
5 mph
0300
72°F
NW
4 mph
4 mph
0600
70°F
SW
6 mph
6 mph
0900
70°F
SW
4 mph
4 mph
1200
73°F
E
5 mph
5 mph
