Weather in Rijeka in August 2025
- August is usually the hottest month of the year in Rijeka;
Average weather
Average temperature in Rijeka in August
The expected average maximum temperature in August is +29°C with a maximum of +35°C and a minimum of +15°C.
The average maximum temperature goes down 15% by the end of the month, compared with the beginning of the month, from +27°C to +24°C.
Is Rijeka warm or cold in August?
Rijeka is typically warm in August.
Maximum temperatures go up compared to the previous month from +29°C to +29°C. The minimum temperature also goes up from +20°C to +20°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in Rijeka, here is the comparison with other months:
Water temperature in Rijeka in August
Water in Rijeka in August is Comfortable. It varies from +22°C to +27°C, with an average of +24°C. This is almost similar to the air temperature, which averages +29°C.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Rijeka in August?
Climate in Rijeka in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +29°C | +24°C | ||||
| Min. temperature | ||||||
| +13°C | +11°C | +9°C | ||||
| Max. temperature | ||||||
| +39°C | +39°C | +33°C | ||||
| Rainfall | ||||||
| 98 mm | 131 mm | 221 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 2 m/s | ||||
| Avg. water temperature | ||||||
| +24°C | +24°C | +23°C | ||||
| Humidity | ||||||
| 59% | 60% | 67% | ||||
| Air pressure | ||||||
| 1013 HPa | 1013 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 13 | 13 | 11 | ||||
| Cloudy days | ||||||
| 3 | 3 | 5 | ||||
| Rainy days | ||||||
| 10 | 10 | 11 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. The temperature levels stay the same in the area of +29°C for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 98 mm to 131 mm. Humidity rises from 59% to 60%. The average wind speed doesn’t change much during August, staying around 1 m/s. The amount of sunny days stay about the same, averaging 13 sunny days during the month.
September brings much the same weather, it remains good.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Rijeka is gradually decreasing during August, going from 3 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Rijeka?
Climate Change over Years
The climate in Rijeka in August has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+16°C) and the highest in 2011 (+20°C). The driest year was 2003 with only 1149 mm of rainfall, and the wettest year was 2019 with 4603 mm.
FAQ
Is August a good time to visit Rijeka?
Can you sunbathe in Rijeka in August?
Can you swim in Rijeka in August?
Is Rijeka rainy in August?
Is it sunny in Rijeka in August?
Other cities in Croatia
Monthly weather in Rijeka
Source of the data
For this page, we’ve looked at the typical weather in Rijeka, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.