20.05
wed
wed
Day
75°F
SW 4 mph
Precip.
0%
0%
Night
55°F
W 5 mph
Precip.
0%
0%
21.05
thu
thu
Day
75°F
S 4 mph
Precip.
0%
0%
Night
57°F
W 5 mph
Precip.
0%
0%
22.05
fri
fri
Day
75°F
SE 6 mph
Precip.
0%
0%
Night
59°F
W 5 mph
Precip.
0%
0%
23.05
sat
sat
Day
77°F
SW 9 mph
Precip.
0%
0%
Night
61°F
W 4 mph
Precip.
0%
0%
24.05
sun
sun
Day
81°F
NW 6 mph
Precip.
0%
0%
Night
63°F
W 4 mph
Precip.
0%
0%
25.05
mon
mon
Day
82°F
NW 4 mph
Precip.
0%
0%
Night
66°F
W 4 mph
Precip.
0%
0%
26.05
tue
tue
Day
84°F
NW 5 mph
Precip.
0%
0%
Night
64°F
W 5 mph
Precip.
0%
0%
27.05
wed
wed
Day
84°F
NW 4 mph
Precip.
0%
0%
Night
64°F
W 4 mph
Precip.
0%
0%
28.05
thu
thu
Day
81°F
E 6 mph
Precip.
0%
0%
Night
61°F
W 4 mph
Precip.
0%
0%
29.05
fri
fri
Day
77°F
NE 6 mph
Precip.
22%
22%
Night
61°F
W 5 mph
Precip.
0%
0%
30.05
sat
sat
Day
72°F
NE 7 mph
Precip.
84%
84%
Night
59°F
W 4 mph
Precip.
100%
100%
31.05
sun
sun
Day
61°F
W 6 mph
Precip.
100%
100%
Night
59°F
W 4 mph
Precip.
26%
26%
01.06
mon
mon
Day
72°F
N 4 mph
Precip.
100%
100%
Night
59°F
W 4 mph
Precip.
22%
22%
02.06
tue
tue
Day
79°F
E 4 mph
Precip.
29%
29%
Night
64°F
E 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 May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 62.7°F. The highest and lowest sea temperatures during the month were 65.1°F and 59.2°F.
Sea water temperature in June, °F
Show year:
2025
2024
2023
The average sea water temperature in June of 2025 was 75.5°F. The highest and lowest sea temperatures during the month were 81.5°F and 71.2°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: 21:26
May 21, thursday
0000
55°F
W
5 mph
5 mph
0300
54°F
W
6 mph
6 mph
0600
54°F
W
5 mph
5 mph
0900
68°F
SW
3 mph
3 mph
1200
75°F
S
4 mph
4 mph
1500
75°F
SE
7 mph
7 mph
1800
72°F
E
4 mph
4 mph
2100
59°F
W
2 mph
2 mph
