Opatija
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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.

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% *
* Data from: Rijeka, Croatia (7 KM, 4 Miles).

Opatija Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Opatija - and find the best time to visit.

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 records 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 50 years of weather records for Opatija, the following extremes were recorded between 1976 and 2026.

  • The warmest day in August was on August 2, 2026, with a maximum of 39°C (102°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

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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.

  • Swimming
    9/10
  • Cycling
    7/10
  • Walking
    7/10
  • Camping
    6/10
  • Outdoor sports
    7/10

Opatija 3-Day Forecast

More climate data for Opatija

Popular in August

Where to go in August - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.