Average sea water temperature in August:
+78.8°F
| Minimum sea water temperature in August: | 84.7°F |
| Maximum sea water temperature in August: | 74.3°F |
Daily sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 81.7°F. The highest and lowest sea temperatures during the month were 84.6°F and 79.7°F.
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Monthly sea water temperature in Portoroz, °F
Which Slovenia resorts have warmest sea in August?
| Place name | August 2026 | August 2025 |
|---|---|---|
| Portoroz | 81.7°F | 77.2°F |
| Piran | 81.7°F | 77.2°F |
| Strunjan | 81.5°F | 77.1°F |
| Koper | 81.3°F | 76.7°F |
| Isola | 81.2°F | 76.9°F |
| Cerkno | 79.6°F | 76.1°F |
| Bohinjsko Jezero | 79.4°F | 76.2°F |
| Dolenjske Toplice | 78.2°F | 74.0°F |
Best time for vacation in Portoroz
Portoroz on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Portoroz
Local time: 13:07
September 20, sunday
1500
75°F
SE
7 mph
7 mph
1800
72°F
SE
2 mph
2 mph
2100
66°F
W
3 mph
3 mph
September 21, monday
0000
64°F
W
3 mph
3 mph
0300
63°F
W
3 mph
3 mph
0600
63°F
SW
3 mph
3 mph
0900
66°F
SW
3 mph
3 mph
1200
79°F
SW
4 mph
4 mph
