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:
2026
2025
2024

The average sea water temperature in May of 2026 was 62.7°F. The highest and lowest sea temperatures during the month were 65.1°F and 59.2°F.

Monthly sea water temperature in Portoroz, °F

Which Slovenia resorts have warmest sea in May?

Place name May 2026 May 2025
Portoroz 62.7°F 65.3°F
Piran 62.7°F 65.3°F
Strunjan 62.5°F 65.2°F
Isola 62.4°F 65.1°F
Koper 62.3°F 64.9°F
Cerkno 61.6°F 63.3°F
Bohinjsko Jezero 61.5°F 63.2°F
Dolenjske Toplice 60.8°F 62.3°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 45.5 °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
22:40
Portoroz
+55°F
W 5 mph
Feels like: +55°F
Precip.: 0%
Places in Slovenia:
Name
°F
Bled
+46°F
Bohinjsko Jezero
+46°F
Dolenjske Toplice
+50°F
Isola
+55°F
Koper
+55°F
Kranjska Gora
+46°F
Ljubljana
+48°F
Maribor
+50°F
Moravske Toplice
+54°F
Piran
+55°F
Portoroz
+55°F
Postojna
+50°F
Rogaska Slatina
+50°F
Strunjan
+55°F
Cerkno
+46°F
all places
24 Hours Forecast
Portoroz
Local time: 22:40
May 21, thursday
0000
55°F
W
5 mph
0300
54°F
W
6 mph
0600
54°F
W
5 mph
0900
68°F
SW
3 mph
1200
75°F
S
4 mph
1500
75°F
SE
7 mph
1800
72°F
E
4 mph
2100
59°F
W
2 mph
Units of measurement: °C / °F