Opatija weather in May 2025

Expect 18°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Opatija in May based on long-term weather averages. There is usually 16 days with some rainfall and 110 mm of average monthly rainfall in May.

  • 18°C maximum daytime temperature in May in Opatija18
    18°C max day temperature
  • 8 hours of sunshine per day
  • 16 days with some rainfall in May in Opatija16
    16 days with some rainfall
  • 8°C minimum night-time temperature in May in Opatija8
    8°C min night temperature
  • 15 hours of daylight per day in May in Opatija15
    15 hours of daylight per day
  • No heat & humidity in May in Opatija0
    No heat & humidity
  • 110 mm monthly rainfall in May in Opatija110
    110 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Opatija7
    7 (High) UV index
  • 17°C sea temperature in May in Opatija17
    17°C sea temperature

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The May weather guide for Croatia (Opatija) 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 Croatia

How hot is it in Opatija in May?

Daytime temperatures usually reach 18°C in Opatija in May, falling to 8°C at night.

How sunny is it in Opatija in May?

There are normally 8 hours of bright sunshine each day in Opatija in May - that's 50% of daylight hours.

How warm is the sea around Opatija in May?

The average sea temperature around Opatija in May is 17°C.

Does it rain in Opatija in May?

There are usually 16 days with some rain in Opatija in May and the average monthly rainfall is 110mm.

Opatija May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:51 19:09
Friday, 16th May 2025 04:32 19:28
Saturday, 31st May 2025 04:19 19:43

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