World Resorts Slovenia Portoroz Weather

Portoroz Sea Temperature in May

Average sea water temperature in May:
+64.3°F
Minimum sea water temperature in May: 74.3°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 65.5°F. The highest and lowest sea temperatures during the month were 74.3°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 65.5°F 65.3°F
Piran 65.5°F 65.3°F
Strunjan 65.5°F 65.2°F
Koper 65.4°F 64.9°F
Isola 65.4°F 65.1°F
Cerkno 64.3°F 63.3°F
Bohinjsko Jezero 64.3°F 63.2°F
Dolenjske Toplice 62.4°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
02:03
Portoroz
+55°F
W 7 mph
Feels like: +54°F
Precip.: 27%
Places in Slovenia:
Name
°F
Bled
+41°F
Bovec
+43°F
Bohinjsko Jezero
+41°F
Dolenjske Toplice
+52°F
Isola
+55°F
Koper
+55°F
Kranjska Gora
+41°F
Ljubljana
+50°F
Maribor
+48°F
Moravske Toplice
+48°F
Piran
+55°F
Portoroz
+55°F
Rogaska Slatina
+50°F
Strunjan
+55°F
Cerkno
+43°F
all places
24 Hours Forecast
Portoroz
Local time: 02:03
June 11, thursday
0300
55°F
W
7 mph
0600
52°F
W
7 mph
0900
61°F
SW
9 mph
1200
68°F
SW
12 mph
1500
64°F
SW
14 mph
1800
68°F
SW
13 mph
2100
59°F
SW
9 mph
June 12, friday
0000
54°F
SW
6 mph
Units of measurement: °C / °F