Opatija weather in October 2026

Q: How hot is it in Opatija in October?

Daytime temperatures usually reach 19°C in Opatija in October, falling to 10°C at night.

Q: How sunny is it in Opatija in October?

There are normally 6 hours of bright sunshine each day in Opatija in October - that's 54% of daylight hours.

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

The average sea temperature around Opatija in October is 20°C.

Q: Does it rain in Opatija in October?

There are usually 12 days with some rain in Opatija in October and the average monthly rainfall is 102mm.

Expect daytime maximum temperatures of 16°C in Opatija, Croatia in October based on long-term weather averages. There are 5 hours of sunshine per day on average with 13 days with some rainfall and typically 148 mm of rainfall in the month.

16
16°C max day temperature
5
5 hours of sunshine per day
13
13 days with some rainfall
7
7°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
148
148 mm of monthly rainfall
3
3 (Moderate) UV index
18
18°C sea temperature

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The October 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)