11.08
tue
tue
Day
97°F
SE 2 mph
Precip.
1%
1%
Night
73°F
W 10 mph
Precip.
19%
19%
12.08
wed
wed
Day
91°F
SW 11 mph
Precip.
1%
1%
Night
72°F
W 7 mph
Precip.
2%
2%
13.08
thu
thu
Day
91°F
SW 8 mph
Precip.
1%
1%
Night
70°F
W 7 mph
Precip.
2%
2%
14.08
fri
fri
Day
91°F
SW 7 mph
Precip.
1%
1%
Night
70°F
W 6 mph
Precip.
1%
1%
15.08
sat
sat
Day
95°F
E 3 mph
Precip.
1%
1%
Night
73°F
W 4 mph
Precip.
1%
1%
16.08
sun
sun
Day
90°F
E 6 mph
Precip.
1%
1%
Night
70°F
W 6 mph
Precip.
3%
3%
17.08
mon
mon
Day
90°F
N 7 mph
Precip.
1%
1%
Night
72°F
SW 5 mph
Precip.
9%
9%
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: 08:06
August 11, tuesday
0900
88°F
SW
3 mph
3 mph
1200
97°F
SE
2 mph
2 mph
1500
95°F
E
4 mph
4 mph
1800
93°F
SE
3 mph
3 mph
2100
82°F
SW
11 mph
11 mph
August 12, wednesday
0000
73°F
W
10 mph
10 mph
0300
70°F
W
7 mph
7 mph
0600
68°F
W
8 mph
8 mph
