Average sea water temperature in October:
+67.3°F
| Minimum sea water temperature in October: | 75.4°F |
| Maximum sea water temperature in October: | 61.2°F |
Daily sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 66.9°F. The highest and lowest sea temperatures during the month were 72.5°F and 62.6°F.
Monthly sea water temperature in Koper, °F
Which Slovenia resorts have warmest sea in October?
| Place name | October 2025 | October 2024 |
|---|---|---|
| Portoroz | 67.1°F | 67.1°F |
| Piran | 67.1°F | 67.1°F |
| Strunjan | 67.0°F | 67.0°F |
| Isola | 66.9°F | 67.0°F |
| Koper | 66.9°F | 66.8°F |
| Cerkno | 65.6°F | 65.6°F |
| Bohinjsko Jezero | 65.4°F | 65.5°F |
| Dolenjske Toplice | 65.4°F | 65.2°F |
Best time for vacation in Koper
Koper on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Koper
Local time: 11:43
December 20, saturday
1200
55°F
S
2 mph
2 mph
1500
54°F
S
2 mph
2 mph
1800
50°F
SW
2 mph
2 mph
2100
43°F
W
4 mph
4 mph
December 21, sunday
0000
41°F
W
4 mph
4 mph
0300
41°F
W
5 mph
5 mph
0600
41°F
W
4 mph
4 mph
0900
41°F
W
4 mph
4 mph
