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Portoroz weather in May 2025
Expect 22°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Portoroz in May. Check more long-term weather averages for Portoroz in May before you book your next holiday to Slovenia in 2025/2026.
- 2222°C max day temperature
- 7 hours of sunshine per day
- 1414 days with some rainfall
- 1212°C min night temperature
- 1515 hours of daylight per day
- 0No heat & humidity
- 9898 mm of monthly rainfall
- 77 (High) UV index
- 1818°C sea temperature
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Recommended for Slovenia
The May weather guide for Slovenia (Portoroz) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Slovenia
How hot is it in Portoroz in May?
Daytime temperatures usually reach 22°C in Portoroz in May, falling to 12°C at night.
How sunny is it in Portoroz in May?
There are normally 7 hours of bright sunshine each day in Portoroz in May - that's 49% of daylight hours.
How warm is the sea around Portoroz in May?
The average sea temperature around Portoroz in May is 18°C.
Does it rain in Portoroz in May?
There are usually 14 days with some rain in Portoroz in May and the average monthly rainfall is 98mm.
Portoroz May sunrise & sunset times
Browse the sunrise and sunset times for Portoroz in May 2025. Select a month to view Portoroz sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Thursday, 1st May 2025 | 04:54 | 19:13 |
Friday, 16th May 2025 | 04:34 | 19:31 |
Saturday, 31st May 2025 | 04:21 | 19:46 |
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