Current sea water temperature:
+64.4°F
| Minimum sea water temperature in May: | 73.2°F |
| Maximum sea water temperature in May: | 57.2°F |
| Average sea water temperature in May: | 64.2°F |
| more information | |
14 days
forecast
forecast
| Portoroz |
monthly
weather
weather
| Portoroz |
Sea water temperature for the last 10 days:
| May 20 | 64.4°F | May 15 | 63.9°F |
| May 19 | 64.2°F | May 14 | 64.2°F |
| May 18 | 63.0°F | May 13 | 64.0°F |
| May 17 | 61.9°F | May 12 | 65.1°F |
| May 16 | 64.0°F | May 11 | 64.4°F |
Monthly sea water temperature, °F
When is the warmest sea in Portoroz?
Based on the data about daily sea water temperature for the last three years the warmest sea in Portoroz was noticed in August, July and September.
Monthly Sea Temperatures in Portoroz, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 77.2°F. The highest and lowest sea temperatures during the month were 79.5°F and 74.5°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 79.0°F. The highest and lowest sea temperatures during the month were 81.9°F and 76.8°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 75.3°F. The highest and lowest sea temperatures during the month were 77.2°F and 73.0°F.
current
weather
weather
| Portoroz |
weather in
May
May
| Portoroz |
Best time for vacation in Portoroz
Portoroz on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Portoroz
Local time: 22:04
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
