Average sea water temperature in January:
+50.6°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 50.5°F. The highest and lowest sea temperatures during the month were 53.2°F and 48.4°F.
Monthly sea water temperature in Koper, °F
Which Slovenia resorts have warmest sea in January?
| Place name | January 2026 | January 2025 |
|---|---|---|
| Dolenjske Toplice | 53.6°F | 53.3°F |
| Portoroz | 51.4°F | 51.6°F |
| Piran | 51.4°F | 51.6°F |
| Strunjan | 51.0°F | 51.1°F |
| Isola | 50.7°F | 50.6°F |
| Koper | 50.5°F | 50.2°F |
| Cerkno | 49.3°F | 49.3°F |
| Bohinjsko Jezero | 49.2°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: 03:35
May 18, monday
0600
46°F
W
5 mph
5 mph
0900
61°F
NW
1 mph
1 mph
1200
66°F
E
5 mph
5 mph
1500
66°F
E
7 mph
7 mph
1800
64°F
NE
5 mph
5 mph
2100
52°F
W
3 mph
3 mph
May 19, tuesday
0000
50°F
W
5 mph
5 mph
0300
48°F
W
5 mph
5 mph
