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Compare Costa Rica weather in February, from dry and sunny Tamarindo to wetter Puerto Viejo, plus Jacó, Arenal and San José.
Nuevo Arenal Weather in August
August in Nuevo Arenal brings high temperatures around 29°C (84°F) during the day, dropping to 22°C (72°F) at night, and as part of the rainy season, heavy rainfall is common.
Rainfall in Nuevo Arenal in August
As part of the rainy season, Nuevo Arenal sees around 22 days of rain in August, with an average of 243 mm (9.6 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Nuevo Arenal in August
Expect highs of 29°C (84°F) in Nuevo Arenal in August, with nights dropping to around 22°C (72°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 22°C (72°F), evenings stay pleasantly warm.Should you favor a climate that's both dry and comfortably warm, January and February typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Nuevo Arenal Temperature in August
Min Temperature
22°C (72°F)
Max Temperature
29°C (84°F)
Chance of Rain
74%
Precipitation
243 mm (9.6 in)
Rainy days
22 days
Humidity
89% *
* Data from: Los Chiles, Costa Rica (57 KM, 35 Miles).
Nuevo Arenal Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Nuevo Arenal - and find the best time to visit.
Daily Historical Temperatures
40-year average (1976-2025)
Based on our historical records, temperatures in Nuevo Arenal typically stay consistent throughout August, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 23°C (73°F).
Average temperatures in August
Daily Historical Precipitation
40-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 Nuevo Arenal in August
Browse day-by-day weather records for Nuevo Arenal spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Nuevo Arenal historical weather extremes in August
Our historical data for Nuevo Arenal spans 1996 to 2026, revealing these weather extremes.
- The warmest day in August was on August 4, 2026, with a maximum of 38°C (100°F).
- The coldest August day was on August 3, 1999, with a maximum of 23°C (73°F).
- Nighttime temperatures dropped to 20°C (68°F) on August 23, 2007, marking the coldest August night on record.
Best Places in Costa Rica in August
Find out more about the weather in Costa Rica and which places have the best travel conditions in this month. See all of Costa Rica 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 Nuevo Arenal in August
Warm but pleasant conditions in Nuevo Arenal in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions.
What To Do in Nuevo Arenal in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Nuevo Arenal 3-Day Forecast
More climate data for Nuevo Arenal
See the full Nuevo Arenal climate overview or explore weather in Costa Rica.
Popular in August
Where to go in August - average daytime high across popular destinations.
Tamarindo
31°C (88°F) Cahuita29°C (84°F) Santa Teresa29°C (84°F) Herradura28°C (82°F) Puerto Viejo de Talamanca29°C (84°F) Fortuna28°C (82°F) Jacó28°C (82°F) San José24°C (75°F) Bucket list
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