Rijeka weather in August 2026

Q: How hot is it in Rijeka in August?

Daytime temperatures usually reach 28°C in Rijeka in August with moderate heat and humidity, falling to 17°C at night.

Q: How sunny is it in Rijeka in August?

There are normally 10 hours of bright sunshine each day in Rijeka in August - that's 70% of daylight hours.

Q: How warm is the sea around Rijeka in August?

The average sea temperature around Rijeka in August is 24°C.

Q: Does it rain in Rijeka in August?

There are usually 9 days with some rain in Rijeka in August and the average monthly rainfall is 64mm.

Expect daytime maximum temperatures of 24°C in Rijeka, Croatia in August based on long-term weather averages. There are 8 hours of sunshine per day on average with 13 days with some rainfall and typically 126 mm of rainfall in the month.

24
24°C max day temperature
8
8 hours of sunshine per day
13
13 days with some rainfall
11
11°C min night temperature
14
14 hours of daylight per day
L
Low heat & humidity
126
126 mm of monthly rainfall
7
7 (High) UV index
24
24°C sea temperature

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The August weather guide for Croatia (Rijeka) 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)