21.07
tue
tue
Day
82°F
SW 6 mph
Precip.
36%
36%
Night
64°F
SW 11 mph
Precip.
6%
6%
22.07
wed
wed
Day
79°F
W 9 mph
Precip.
2%
2%
Night
63°F
W 5 mph
Precip.
5%
5%
23.07
thu
thu
Day
77°F
E 3 mph
Precip.
5%
5%
Night
55°F
W 6 mph
Precip.
10%
10%
24.07
fri
fri
Day
77°F
SE 6 mph
Precip.
1%
1%
Night
63°F
W 4 mph
Precip.
7%
7%
25.07
sat
sat
Day
81°F
E 7 mph
Precip.
1%
1%
Night
63°F
W 5 mph
Precip.
5%
5%
26.07
sun
sun
Day
73°F
N 14 mph
Precip.
48%
48%
Night
63°F
W 5 mph
Precip.
84%
84%
27.07
mon
mon
Day
70°F
W 4 mph
Precip.
74%
74%
Night
61°F
SW 7 mph
Precip.
7%
7%
28.07
tue
tue
Day
77°F
E 4 mph
Precip.
2%
2%
Night
61°F
W 4 mph
Precip.
9%
9%
29.07
wed
wed
Day
81°F
E 4 mph
Precip.
1%
1%
Night
64°F
W 4 mph
Precip.
7%
7%
30.07
thu
thu
Day
82°F
E 5 mph
Precip.
2%
2%
Night
66°F
W 4 mph
Precip.
7%
7%
31.07
fri
fri
Day
84°F
NE 7 mph
Precip.
3%
3%
Night
66°F
W 7 mph
Precip.
47%
47%
01.08
sat
sat
Day
79°F
SW 12 mph
Precip.
8%
8%
Night
66°F
SW 11 mph
Precip.
4%
4%
02.08
sun
sun
Day
81°F
SW 11 mph
Precip.
1%
1%
Night
64°F
W 9 mph
Precip.
3%
3%
03.08
mon
mon
Day
81°F
SW 11 mph
Precip.
1%
1%
Night
68°F
SW 5 mph
Precip.
3%
3%
Sea water temperature in July, °F
Show year:
2026
2025
2024
The average sea water temperature in July of 2026 was 80.1°F. The highest and lowest sea temperatures during the month were 83.8°F and 78.1°F.
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 76.7°F. The highest and lowest sea temperatures during the month were 79.2°F and 74.1°F.
Air temperature in Koper, °F
Precipitation total in Koper, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Koper
Koper on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Koper
Local time: 18:13
July 21, tuesday
2100
66°F
SW
11 mph
11 mph
July 22, wednesday
0000
64°F
SW
11 mph
11 mph
0300
66°F
W
12 mph
12 mph
0600
64°F
W
11 mph
11 mph
0900
73°F
W
12 mph
12 mph
1200
79°F
W
9 mph
9 mph
1500
82°F
S
2 mph
2 mph
1800
79°F
E
7 mph
7 mph
