Average sea water temperature in January:
+50.7°F
| Minimum sea water temperature in January: | 54.7°F |
| Maximum sea water temperature in January: | 46.8°F |
Daily sea water temperature in January, °F
Show year:
2026
2025
2024
The average sea water temperature in January of 2026 was 51.4°F. The highest and lowest sea temperatures during the month were 53.2°F and 49.5°F.
Monthly sea water temperature in Koper, °F
Which Slovenia resorts have warmest sea in January?
| Place name | January 2026 | January 2025 |
|---|---|---|
| Dolenjske Toplice | 54.4°F | 53.3°F |
| Portoroz | 52.3°F | 51.6°F |
| Piran | 52.3°F | 51.6°F |
| Strunjan | 52.0°F | 51.1°F |
| Isola | 51.7°F | 50.6°F |
| Koper | 51.4°F | 50.2°F |
| Cerkno | 50.4°F | 49.3°F |
| Bohinjsko Jezero | 50.3°F | 49.3°F |
Best time for vacation in Koper
Koper on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Koper
Local time: 00:51
January 16, friday
0300
43°F
NW
1 mph
1 mph
0600
43°F
NW
1 mph
1 mph
0900
43°F
W
1 mph
1 mph
1200
50°F
E
2 mph
2 mph
1500
50°F
SE
2 mph
2 mph
1800
46°F
SW
1 mph
1 mph
2100
43°F
W
2 mph
2 mph
January 17, saturday
0000
43°F
W
2 mph
2 mph
