Average sea water temperature in May:
+64.2°F
| Minimum sea water temperature in May: | 74.7°F |
| Maximum sea water temperature in May: | 56.7°F |
Daily sea water temperature in May, °F
Show year:
2026
2025
2024
The average sea water temperature in May of 2026 was 65.4°F. The highest and lowest sea temperatures during the month were 74.7°F and 57.7°F.
Monthly sea water temperature in Isola, °F
Which Slovenia resorts have warmest sea in May?
| Place name | May 2026 | May 2025 |
|---|---|---|
| Portoroz | 65.5°F | 65.3°F |
| Piran | 65.5°F | 65.3°F |
| Strunjan | 65.5°F | 65.2°F |
| Koper | 65.4°F | 64.9°F |
| Isola | 65.4°F | 65.1°F |
| Cerkno | 64.3°F | 63.3°F |
| Bohinjsko Jezero | 64.3°F | 63.2°F |
| Dolenjske Toplice | 62.4°F | 62.3°F |
Best time for vacation in Isola
Isola on a weather map
Places in Slovenia:
Name
°F
24 Hours Forecast
Isola
Local time: 16:10
September 22, tuesday
1800
66°F
S
2 mph
2 mph
2100
57°F
W
4 mph
4 mph
September 23, wednesday
0000
55°F
W
6 mph
6 mph
0300
57°F
W
2 mph
2 mph
0600
54°F
W
4 mph
4 mph
0900
59°F
W
3 mph
3 mph
1200
66°F
SE
5 mph
5 mph
1500
66°F
SE
6 mph
6 mph
