World Resorts Slovenia Portoroz Weather

Portoroz Sea Temperature in September

Average sea water temperature in September:
+74.4°F
Minimum sea water temperature in September: 82.9°F
Maximum sea water temperature in September: 68.9°F

Daily sea water temperature in September, °F

Show year:
2026
2025
2024

The average sea water temperature in September of 2026 was 77.6°F. The highest and lowest sea temperatures during the month were 81.5°F and 74.3°F.

Monthly sea water temperature in Portoroz, °F

Which Slovenia resorts have warmest sea in September?

Place name September 2026 September 2025
Portoroz 77.6°F 75.3°F
Piran 77.6°F 75.3°F
Strunjan 77.4°F 75.2°F
Koper 77.1°F 75.2°F
Isola 77.1°F 75.1°F
Cerkno 75.2°F 73.6°F
Bohinjsko Jezero 75.0°F 73.3°F
Dolenjske Toplice 74.6°F 71.7°F

Best time for vacation in Portoroz

Sunniest months:
August 23 days
July 22 days
June 20 days
Warmest months:
August 85.3 °F
July 84.8 °F
June 80.4 °F
Warmest sea temp:
August 78.9 °F
July 78.5 °F
September 74.4 °F
Coldest months:
January 45.5 °F
December 48.0 °F
February 48.5 °F
Rainiest months:
May 7 days
November 6 days
September 6 days
Windiest months:
February 6.4 mph
March 6.3 mph
November 6.1 mph

Portoroz on a weather map

Current weather
11:05
Portoroz
+54°F
SW 16 mph
Feels like: +50°F
Precip.: 3%
Places in Slovenia:
Name
°F
Bled
+39°F
Bohinjsko Jezero
+39°F
Dolenjske Toplice
+45°F
Isola
+54°F
Koper
+54°F
Kranjska Gora
+39°F
Ljubljana
+46°F
Maribor
+46°F
Moravske Toplice
+50°F
Piran
+54°F
Portoroz
+54°F
Rogaska Slatina
+41°F
Strunjan
+54°F
Cerkno
+45°F
Smarjeske Toplice
+45°F
all places
24 Hours Forecast
Portoroz
Local time: 11:05
November 01, sunday
1200
54°F
SW
16 mph
1500
50°F
SW
14 mph
1800
50°F
SW
14 mph
2100
46°F
SW
14 mph
November 02, monday
0000
46°F
SW
14 mph
0300
48°F
SW
18 mph
0600
48°F
SW
15 mph
0900
50°F
SW
16 mph
Units of measurement: °C / °F