Portoroz weather in June 2025

Expect 25°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Portoroz in June. Check more long-term weather averages for Portoroz in June before you book your next holiday to Slovenia in 2025/2026.

  • 25°C maximum daytime temperature in June in Portoroz25
    25°C max day temperature
  • 8 hours of sunshine per day
  • 14 days with some rainfall in June in Portoroz14
    14 days with some rainfall
  • 15°C minimum night-time temperature in June in Portoroz15
    15°C min night temperature
  • 16 hours of daylight per day in June in Portoroz16
    16 hours of daylight per day
  • No heat & humidity in June in Portoroz0
    No heat & humidity
  • 115 mm monthly rainfall in June in Portoroz115
    115 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in June in Portoroz8
    8 (Very High) UV index
  • 22°C sea temperature in June in Portoroz22
    22°C sea temperature

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The June 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)

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More about Slovenia

How hot is it in Portoroz in June?

Daytime temperatures usually reach 25°C in Portoroz in June with no heat and humidity, falling to 15°C at night.

How sunny is it in Portoroz in June?

There are normally 8 hours of bright sunshine each day in Portoroz in June - that's 51% of daylight hours.

How warm is the sea around Portoroz in June?

The average sea temperature around Portoroz in June is 22°C.

Does it rain in Portoroz in June?

There are usually 14 days with some rain in Portoroz in June and the average monthly rainfall is 115mm.

Portoroz June sunrise & sunset times

Browse the sunrise and sunset times for Portoroz in June 2025. Select a month to view Portoroz sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st June 2025 04:20 19:47
Sunday, 15th June 2025 04:16 19:56
Monday, 30th June 2025 04:20 19:58

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