Opatija weather in April 2026

Q: How warm is it in Opatija in April?

Daytime temperatures usually reach 16°C in Opatija in April, falling to 8°C at night.

Q: How sunny is it in Opatija in April?

There are normally 7 hours of bright sunshine each day in Opatija in April - that's 49% of daylight hours.

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

The average sea temperature around Opatija in April is 14°C.

Q: Does it rain in Opatija in April?

There are usually 13 days with some rain in Opatija in April and the average monthly rainfall is 82mm.

Expect daytime maximum temperatures of 55°F in Opatija, Croatia in April based on long-term weather averages. There are 6 hours of sunshine per day on average with 16 days with some rainfall and typically 4.6 inches of rainfall in the month.

55
55°F max day temperature
6
6 hours of sunshine per day
16
16 days with some rainfall
39
39°F min night temperature
14
14 hours of daylight per day
0
No heat & humidity
4.6
4.6 inches of monthly rainfall
5
5 (Moderate) UV index
54
54°F sea temperature

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The April 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) | Imperial (°F)