Current sea water temperature:
+52.5°F
| Minimum sea water temperature in January: | 54.7°F |
| Maximum sea water temperature in January: | 46.8°F |
| Average sea water temperature in January: | 50.7°F |
| more information | |
14 days
forecast
forecast
| Koper |
monthly
weather
weather
| Koper |
Sea water temperature for the last 10 days:
| January 4 | 52.5°F | December 30 | 53.4°F |
| January 3 | 53.1°F | December 29 | 54.3°F |
| January 2 | 52.9°F | December 28 | 54.3°F |
| January 1 | 53.2°F | December 27 | 54.5°F |
| December 31 | 53.6°F | December 26 | 54.9°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
January
January
| Koper |
Best time for vacation in Koper
Koper on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Koper
Local time: 04:35
January 05, monday
0600
30°F
W
7 mph
7 mph
0900
32°F
SW
7 mph
7 mph
1200
34°F
SW
7 mph
7 mph
1500
34°F
SW
7 mph
7 mph
1800
34°F
W
7 mph
7 mph
2100
28°F
W
7 mph
7 mph
January 06, tuesday
0000
28°F
SW
8 mph
8 mph
0300
28°F
SW
9 mph
9 mph
