Arenal Weather in August

Mild and comfortable, with frequent heavy rain. Average highs of 20°C and lows of 15°C, with around 29 rainy days expected throughout the month.

While August isn't our top-rated month for Arenal, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.

Average high

20°C

Average low

15°C

Rainy days

29 days

Best months to visit

Year-round

What to do in Arenal in August

Whatever the weather, Arenal rewards curious visitors. Here are some of the best ways to spend your time:

Arenal volcano hiking and viewing Natural hot spring soaking in thermal pools Lake Arenal kayaking and fishing Hanging bridges and canopy walks through forest Rainforest night tours and wildlife spotting Adventure activities: zip-lining, rappelling, canyoning

What to pack for August

Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.