Opatija weather in August
Temperature, sea and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Excellent
Best time to visit: June – August
What is the weather like in Opatija in August?
In August, Opatija is hot: daytime highs average 28 °C, and nights cool down to about 20 °C. The sea averages 23.6 °C – pleasant for swimming. With around 10 hours of sunshine a day, there is plenty of sun. Rain falls on about 8 days, adding up to 78 mm. On about 9 days the thermometer climbs to 30 °C or more. All in all, August is an excellent month for a holiday in Opatija.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 94 | 94 | 60 |
| Day | 28° | 28° | 23° |
| Night | 20° | 20° | 16° |
| Sea | 24° | 24° | 21° |
| Sun | 11 h | 10 h | 8 h |
| Rain days | 7 | 8 | 10 |
More details for August
- Daylight
- 14 h 10 min06:03 – 20:13
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 6 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 35 %on averageAll months
- Hot days
- 9 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2Europe/Zagreb
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %94 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %75 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in August
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
Opatija in August: quick answers
Is Opatija hot in August?
Yes. In August, Opatija is hot: daytime highs average 28 °C and nights stay around 20 °C. On about 9 days the thermometer climbs to 30 °C or more.
Can you swim in Opatija in August?
Yes. In August the sea averages 23.6 °C – pleasant for swimming.
Does it rain much in Opatija in August?
Rain falls on about 8 days, adding up to 78 mm.
Opatija month by month
The whole year in OpatijaAll destinations: CroatiaWhere to go in AugustSea temperature in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences