Opatija weather in June 2026

Q: How hot is it in Opatija in June?

Daytime temperatures usually reach 25°C in Opatija in June with low heat and humidity, falling to 15°C at night.

Q: How sunny is it in Opatija in June?

There are normally 9 hours of bright sunshine each day in Opatija in June - that's 61% of daylight hours.

Q: How warm is the sea around Opatija in June?

The average sea temperature around Opatija in June is 21°C.

Q: Does it rain in Opatija in June?

There are usually 13 days with some rain in Opatija in June and the average monthly rainfall is 74mm.

Expect daytime maximum temperatures of 22°C in Opatija, Croatia in June based on long-term weather averages. There are 8 hours of sunshine per day on average with 16 days with some rainfall and typically 119 mm of rainfall in the month.

22
22°C max day temperature
8
8 hours of sunshine per day
16
16 days with some rainfall
11
11°C min night temperature
16
16 hours of daylight per day
0
No heat & humidity
119
119 mm of monthly rainfall
8
8 (Very High) UV index
21
21°C sea temperature

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The June 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)