Measurements:
°C
°F
Isola
76°F
NW 6 mph
Feels like: 80°F
Precip: 4%
World Resorts Slovenia Isola Weather

Isola Sea Water Temperature

Current Sea Water Temperature:
+83.0°F
Maximum Sea Water Temperature in September: 85.8°F
Minimum Sea Water Temperature in September: 71.0°F
Average water temperature in September: 76.7°F

Sea Water Temperature for the Last 10 Days:

September 08 83.0°F September 03 84.2°F
September 07 83.4°F September 02 84.4°F
September 06 83.8°F September 01 84.8°F
September 05 84.2°F August 31 84.8°F
September 04 84.0°F August 30 85.0°F

When is the Warmest Sea for Isola?

According to our data for the last three years for Isola the highest average sea water temperature was in August, July and September.

Average Water Temperature by Month, °F

Sea Water Temperature in August

Select Year: 2026 2025 2024

The average sea surface temperature in August 2026 for Isola was 84.7°F. The maximum and minimum values were 83.0°F and 87.4°F respectively.

Sea Water Temperature in July

Select Year: 2026 2025 2024

The average sea surface temperature in July 2026 for Isola was 82.9°F. The maximum and minimum values were 80.6°F and 87.8°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Isola was 77.9°F. The maximum and minimum values were 75.6°F and 80.2°F respectively.

Best Time to Visit Isola
The most sunny months:
August 23 days
July 22 days
June 20 days
The most warm months:
August 89.1 °F
July 88.6 °F
June 83.6 °F
Warmest sea temperature:
August 81.8 °F
July 81.4 °F
September 76.6 °F
The most cold months:
January 45.0 °F
December 47.8 °F
February 48.1 °F
The most rainy months:
May 7 days
November 6 days
September 6 days
The most windy months:
March 6 mph
February 6 mph
November 6 mph

Isola on the Weather Map

Slovenia Resorts:
NAME
Bled +62
Bohinjsko Jezero +62
Bovec +74
Cerkno +64
Dolenjske Toplice +74
Isola +76
Koper +76
Ljubljana +72
Maribor +76
Moravske Toplice +78
Piran +76
Portoroz +76
Rogaska Slatina +72
Smarjeske Toplice +74
Strunjan +76
24 Hours Weather Forecast
Isola
Local time: 21:45
09 sep, wednesday
0000 72°F
W
4 mph
0300 68°F
W
2 mph
0600 66°F
NW
5 mph
0900 72°F
W
4 mph
1200 76°F
W
4 mph
1500 84°F
N
9 mph
1800 78°F
NE
9 mph
2100 68°F
NW
6 mph