World Resorts Slovenia Portoroz Weather

Portoroz Sea Temperature in May

Average sea water temperature in May:
+64.2°F
Minimum sea water temperature in May: 73.2°F
Maximum sea water temperature in May: 57.2°F

Daily sea water temperature in May, °F

Show year:
2025
2024
2023

The average sea water temperature in May of 2025 was 65.3°F. The highest and lowest sea temperatures during the month were 68.5°F and 60.1°F.

Monthly sea water temperature in Portoroz, °F

Which Slovenia resorts have warmest sea in May?

Place name May 2025 May 2024
Portoroz 65.3°F 64.5°F
Piran 65.3°F 64.5°F
Strunjan 65.2°F 64.3°F
Isola 65.1°F 64.1°F
Koper 64.9°F 64.1°F
Cerkno 63.3°F 63.4°F
Bohinjsko Jezero 63.2°F 63.3°F
Dolenjske Toplice 62.3°F 64.0°F

Best time for vacation in Portoroz

Sunniest months:
August 23 days
July 22 days
June 20 days
Warmest months:
August 85.0 °F
July 84.9 °F
June 80.3 °F
Warmest sea temp:
August 78.7 °F
July 78.4 °F
September 74.2 °F
Coldest months:
January 45.6 °F
December 47.7 °F
February 48.3 °F
Rainiest months:
May 7 days
November 6 days
September 6 days
Windiest months:
February 6.5 mph
March 6.4 mph
November 6.1 mph

Portoroz on a weather map

Current weather
10:38
Portoroz
+48°F
N 2 mph
Feels like: +50°F
Precip.: 100%
Places in Slovenia:
Name
°F
Bohinjsko Jezero
+43°F
Dolenjske Toplice
+55°F
Zrece
+52°F
Isola
+54°F
Koper
+54°F
Kranjska Gora
+43°F
Ljubljana
+52°F
Maribor
+50°F
Moravske Toplice
+48°F
Piran
+54°F
Portoroz
+54°F
Rogaska Slatina
+52°F
Strunjan
+54°F
Terme Radenci
+50°F
Cerkno
+50°F
all places
24 Hours Forecast
Portoroz
Local time: 10:38
December 18, thursday
1200
54°F
N
2 mph
1500
54°F
E
2 mph
1800
52°F
N
2 mph
2100
46°F
N
1 mph
December 19, friday
0000
46°F
NE
2 mph
0300
46°F
N
2 mph
0600
46°F
N
2 mph
0900
46°F
NE
1 mph
Units of measurement: °C / °F