Measurements:
°C
°F
Piran
40°F
SW 3 mph
Feels like: 38°F
Precip: 0%
World Resorts Slovenia Piran Weather

Piran Sea Water Temperature

Current Sea Water Temperature:
+50.6°F
Maximum Sea Water Temperature in February: 53.0°F
Minimum Sea Water Temperature in February: 42.8°F
Average water temperature in February: 49.2°F

Sea Water Temperature for the Last 10 Days:

February 21 50.6°F February 16 50.2°F
February 20 49.8°F February 15 50.0°F
February 19 49.6°F February 14 50.0°F
February 18 50.0°F February 13 50.0°F
February 17 49.0°F February 12 50.2°F

When is the Warmest Sea for Piran?

According to our data for the last three years for Piran 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: 2025 2024 2023

The average sea surface temperature in August 2025 for Piran was 80.3°F. The maximum and minimum values were 77.2°F and 82.8°F respectively.

Sea Water Temperature in July

Select Year: 2025 2024 2023

The average sea surface temperature in July 2025 for Piran was 82.2°F. The maximum and minimum values were 79.8°F and 85.4°F respectively.

Sea Water Temperature in September

Select Year: 2025 2024 2023

The average sea surface temperature in September 2025 for Piran was 78.2°F. The maximum and minimum values were 75.6°F and 80.2°F respectively.

Best Time to Visit Piran
The most sunny months:
August 23 days
July 22 days
June 20 days
The most warm months:
August 89.0 °F
July 88.9 °F
June 83.8 °F
Warmest sea temperature:
August 81.9 °F
July 81.5 °F
September 76.9 °F
The most cold months:
January 45.0 °F
December 47.8 °F
February 48.2 °F
The most rainy months:
May 7 days
November 6 days
September 6 days
The most windy months:
February 6 mph
March 6 mph
November 6 mph

Piran on the Weather Map

Slovenia Resorts:
NAME
Bled +32
Bohinjsko Jezero +32
Bovec +34
Cerkno +34
Dolenjske Toplice +28
Isola +40
Koper +40
Kranjska Gora +32
Ljubljana +32
Maribor +24
Piran +40
Portoroz +40
Rogaska Slatina +26
Rogla +26
Strunjan +40
24 Hours Weather Forecast
Piran
Local time: 20:58
21 feb, saturday
2100 40°F
SW
3 mph
22 feb, sunday
0000 38°F
SW
2 mph
0300 36°F
W
4 mph
0600 36°F
W
3 mph
0900 44°F
W
2 mph
1200 54°F
E
2 mph
1500 52°F
E
2 mph
1800 44°F
E
0 mph