Opatija Weather & Climate: Best Time to Visit

The climate in Opatija is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 27°C (81°F) in August to a chilly 7°C (45°F) in the coolest month, January.

Nights vary from 18°C (64°F) in August to around 1°C (34°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Opatija has a notably wet climate with abundant precipitation, recording 1925 mm (76 in) of rain/snowfall per year. The climate in Opatija shows significant variation throughout the year. Expect heavy rainfall in November, the wettest month, with an average of 250 mm (9.8 in) of precipitation over 14 rainy days.

In contrast, the driest month July offers drier and sunnier days, with around 101 mm (4 in) of rainfall over 12 rainy days. For more details, please visit our Opatija Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Opatija serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.9 hours of sunshine daily, and embrace the darker days in December, offering only 3.3 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The mean water temperature over the year ranges from 11°C (52°F) in January to 25°C (77°F) in August.

Water temperature over the year

The relative humidity is high throughout the year in Opatija.

The city experiences its highest humidity in November, reaching 67%. In July, the humidity drops to its lowest level at 56%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year