21.12
sun
sun
Day
54°F
W 2 mph
Precip.
0%
0%
Night
45°F
W 3 mph
Precip.
0%
0%
22.12
mon
mon
Day
52°F
W 3 mph
Precip.
0%
0%
Night
46°F
W 4 mph
Precip.
100%
100%
23.12
tue
tue
Day
55°F
SW 2 mph
Precip.
65%
65%
Night
41°F
W 7 mph
Precip.
0%
0%
24.12
wed
wed
Day
46°F
SW 13 mph
Precip.
100%
100%
Night
39°F
W 15 mph
Precip.
0%
0%
25.12
thu
thu
Day
45°F
SW 17 mph
Precip.
100%
100%
Night
36°F
SW 19 mph
Precip.
0%
0%
26.12
fri
fri
Day
41°F
SW 18 mph
Precip.
0%
0%
Night
32°F
SW 16 mph
Precip.
0%
0%
27.12
sat
sat
Day
39°F
SW 15 mph
Precip.
0%
0%
Night
30°F
SW 11 mph
Precip.
0%
0%
sea water
temperature
temperature
| Portoroz |
monthly
weather
weather
| Portoroz |
current
weather
weather
| Portoroz |
14 days
forecast
forecast
| Portoroz |
Sea water temperature in December, °F
Show year:
2025
2024
2023
The average sea water temperature in December of 2025 was 56.6°F. The highest and lowest sea temperatures during the month were 57.9°F and 55.2°F.
Sea water temperature in January, °F
Show year:
2025
2024
2023
The average sea water temperature in January of 2025 was 51.6°F. The highest and lowest sea temperatures during the month were 53.2°F and 50.4°F.
Air temperature in Portoroz, °F
Precipitation total in Portoroz, in.
* Charts above show average data for the last 3 years.
Best time for vacation in Portoroz
Portoroz on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Portoroz
Local time: 01:26
December 21, sunday
0300
41°F
W
4 mph
4 mph
0600
41°F
W
4 mph
4 mph
0900
41°F
W
4 mph
4 mph
1200
54°F
W
2 mph
2 mph
1500
54°F
SW
2 mph
2 mph
1800
48°F
W
3 mph
3 mph
2100
45°F
W
4 mph
4 mph
December 22, monday
0000
45°F
W
3 mph
3 mph
