Mild
Average highs are around 25°C, so days are mild rather than hot.
Weather Guide
Opatija, Croatia Average Monthly Weather
Weather score33Poor annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 15°C, sunshine averages 5.9h per day, and rainfall totals about 1470mm. Sea temperatures average 16°C across the year.
Annual weather
Annual averages
Temp
15°C
Rain
1470mm
Annual total
Sun
5.9h
Sea
16°C
Weather score
33
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 88mm, so some wet days are possible.
Bright
Sunshine averages 9.5h per day, so bright days are a strong part of the month.
Swimmable
Sea temperatures average 23°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Opatija, Croatia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July25°C average high
July is one of Opatija's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July88mm average rain
July is one of Opatija's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July9.5 hours average sun
July is one of Opatija's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July23°C average sea
July is one of Opatija's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJune to September
Sea temperatures are usually near 21°C in this stretch, so swimming comfort is at its strongest.
Weather score
July65 weather score
July is one of Opatija's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
