Current sea water temperature:
+80.2°F
| Minimum sea water temperature in August: | 84.9°F |
| Maximum sea water temperature in August: | 73.9°F |
| Average sea water temperature in August: | 78.4°F |
| more information | |
14 days
forecast
forecast
| Koper |
monthly
weather
weather
| Koper |
Sea water temperature for the last 10 days:
| August 10 | 80.2°F | August 5 | 82.4°F |
| August 9 | 81.5°F | August 4 | 82.6°F |
| August 8 | 83.3°F | August 3 | 82.4°F |
| August 7 | 83.8°F | August 2 | 82.9°F |
| August 6 | 82.9°F | August 1 | 82.2°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:
2026
2025
2024
The average sea water temperature in July of 2026 was 79.5°F. The highest and lowest sea temperatures during the month were 83.8°F and 76.8°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
August
August
| Koper |
Best time for vacation in Koper
Koper on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Koper
Local time: 08:07
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
