Current sea water temperature:
+54.0°F
| Minimum sea water temperature in March: | 56.5°F |
| Maximum sea water temperature in March: | 45.5°F |
| Average sea water temperature in March: | 50.5°F |
| more information | |
14 days
forecast
forecast
| Koper |
monthly
weather
weather
| Koper |
Sea water temperature for the last 10 days:
| March 17 | 54.0°F | March 12 | 52.5°F |
| March 16 | 53.8°F | March 11 | 52.5°F |
| March 15 | 53.6°F | March 10 | 52.0°F |
| March 14 | 53.8°F | March 9 | 51.6°F |
| March 13 | 53.1°F | March 8 | 50.9°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
March
March
| Koper |
Best time for vacation in Koper
Koper on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Koper
Local time: 08:31
March 17, tuesday
0900
52°F
SW
11 mph
11 mph
1200
57°F
SW
11 mph
11 mph
1500
57°F
W
11 mph
11 mph
1800
50°F
W
8 mph
8 mph
2100
43°F
W
6 mph
6 mph
March 18, wednesday
0000
41°F
SW
6 mph
6 mph
0300
39°F
S
4 mph
4 mph
0600
39°F
SW
4 mph
4 mph
