Opatija Weather in August
August in Opatija brings high temperatures, with daytime highs of 27°C (81°F) and nights around 18°C (64°F). Quite a bit of rainfall is expected, around 121 mm (4.8 in), so pack an umbrella.
Rainfall in Opatija in August
Typically around 13 days of rainfall are expected, averaging 121 mm (4.8 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Opatija in August
In August, Opatija sees high temperatures, with highs of 27°C (81°F). Nights drop to around 18°C (64°F). Experience the summer season in August. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions. On average, it is the warmest month of the year.
Sunshine in Opatija in August
Enjoy a sunny month with about 281 hours of sunshine, the clear skies make Opatija even more beautiful.
Average water temperature in August
At 25°C (77°F), the water is warm and comfortable for swimming. Most people find this temperature ideal for spending longer periods in the water.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Croatia, check out our Opatija's climate page.
Opatija Temperature in August
Min Temperature
18°C (64°F)
Max Temperature
27°C (81°F)
Water Temperature
25°C (77°F) *
Chance of Rain
43%
Precipitation
121 mm (4.8 in)
Rainy days
13 days
Humidity
56% *
Sunshine
281 hours *
Percentage Sunshine
71% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Opatija typically stay consistent throughout August, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows typically ranging from 17°C (63°F) to 20°C (68°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Opatija in August
Browse day-by-day weather records for Opatija spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Opatija historical weather extremes in August
According to our 49 years of weather records for Opatija, the following extremes were recorded between 1976 and 2025.
- The warmest day in August was on August 4, 2013, with a maximum of 38°C (100°F).
- The coldest August day was on August 30, 2010, with a maximum of 17°C (63°F).
- The lowest overnight temperature recorded in August was 8°C (46°F) (August 31, 2010).
Best Places in Croatia in August
Find out more about the weather in Croatia and which places have the best travel conditions in this month. See all of Croatia in August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Opatija in August
Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 25°C (77°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Opatija in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Croatia, check out our Opatija's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Opatija climate overview or explore weather in Croatia.
