26.12
fri
fri
Day
45°F
SW 6 mph
Precip.
0%
0%
Night
32°F
W 6 mph
Precip.
0%
0%
27.12
sat
sat
Day
50°F
SW 4 mph
Precip.
0%
0%
Night
36°F
W 4 mph
Precip.
0%
0%
28.12
sun
sun
Day
50°F
SW 8 mph
Precip.
0%
0%
Night
32°F
W 5 mph
Precip.
0%
0%
29.12
mon
mon
Day
46°F
SE 2 mph
Precip.
0%
0%
Night
34°F
W 2 mph
Precip.
0%
0%
30.12
tue
tue
Day
48°F
W 1 mph
Precip.
0%
0%
Night
30°F
W 6 mph
Precip.
0%
0%
31.12
wed
wed
Day
41°F
NW 1 mph
Precip.
0%
0%
Night
32°F
W 6 mph
Precip.
0%
0%
01.01
thu
thu
Day
37°F
SW 4 mph
Precip.
0%
0%
Night
27°F
SW 4 mph
Precip.
0%
0%
02.01
fri
fri
Day
36°F
SW 9 mph
Precip.
0%
0%
Night
25°F
W 3 mph
Precip.
0%
0%
03.01
sat
sat
Day
37°F
N 2 mph
Precip.
0%
0%
Night
25°F
W 4 mph
Precip.
29%
29%
04.01
sun
sun
Day
39°F
E 2 mph
Precip.
0%
0%
Night
34°F
W 3 mph
Precip.
0%
0%
05.01
mon
mon
Day
37°F
SW 3 mph
Precip.
100%
100%
Night
30°F
SW 18 mph
Precip.
100%
100%
06.01
tue
tue
Day
34°F
SW 15 mph
Precip.
0%
0%
Night
27°F
SW 11 mph
Precip.
0%
0%
07.01
wed
wed
Day
36°F
SW 7 mph
Precip.
0%
0%
Night
25°F
W 6 mph
Precip.
0%
0%
08.01
thu
thu
Day
41°F
E 3 mph
Precip.
0%
0%
Night
30°F
W 3 mph
Precip.
0%
0%
sea water
temperature
temperature
| Portoroz |
monthly
weather
weather
| Portoroz |
current
weather
weather
| Portoroz |
7 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 56.5°F. The highest and lowest sea temperatures during the month were 57.9°F and 55.0°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: 08:15
December 26, friday
0900
32°F
W
6 mph
6 mph
1200
45°F
SW
6 mph
6 mph
1500
45°F
SW
6 mph
6 mph
1800
39°F
W
6 mph
6 mph
2100
32°F
W
6 mph
6 mph
December 27, saturday
0000
32°F
W
6 mph
6 mph
0300
32°F
W
6 mph
6 mph
0600
32°F
SW
6 mph
6 mph
