Current sea water temperature:
+83.7°F
| Minimum sea water temperature in July: | 85.3°F |
| Maximum sea water temperature in July: | 73.0°F |
| Average sea water temperature in July: | 78.1°F |
| more information | |
14 days
forecast
forecast
| Koper |
monthly
weather
weather
| Koper |
Sea water temperature for the last 10 days:
| July 1 | 83.7°F | June 26 | 82.2°F |
| June 30 | 83.3°F | June 25 | 80.4°F |
| June 29 | 83.5°F | June 24 | 80.2°F |
| June 28 | 82.4°F | June 23 | 79.7°F |
| June 27 | 81.9°F | June 22 | 81.3°F |
Monthly sea water temperature, °F
When is the warmest sea in Koper?
Based on the data about daily sea water temperature for the last three years the warmest sea in Koper was noticed in August, July and September.
Monthly Sea Temperatures in Koper, °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.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 78.7°F. The highest and lowest sea temperatures during the month were 81.9°F and 76.5°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 75.2°F. The highest and lowest sea temperatures during the month were 77.5°F and 73.0°F.
current
weather
weather
| Koper |
weather in
July
July
| Koper |
Best time for vacation in Koper
Koper on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Koper
Local time: 09:48
July 01, wednesday
1200
93°F
E
4 mph
4 mph
1500
90°F
E
7 mph
7 mph
1800
91°F
NE
3 mph
3 mph
2100
72°F
S
4 mph
4 mph
July 02, thursday
0000
68°F
W
7 mph
7 mph
0300
66°F
SW
4 mph
4 mph
0600
64°F
SW
6 mph
6 mph
0900
77°F
SW
11 mph
11 mph
