Arenal in June, July and August: the green summer

June, July, and August bring lush green landscapes, fewer crowds, and reliable morning weather for hiking, waterfalls, and hot springs around Arenal.

When people think of Costa Rica’s dry season, they picture endless sunshine. But the green summer from June to August offers something just as special: vibrant rainforests, full rivers, and a quieter, more intimate experience around Arenal Volcano. The rain usually comes in short afternoon bursts, leaving mornings clear and perfect for exploring.

If you are planning a trip during these months, you will find lower accommodation rates and fewer tourists on the trails. The landscape is at its most photogenic, with every shade of green you can imagine. Here is what to expect and how to make the most of your visit.

Weather and what to pack

June, July, and August are part of the rainy season, but that does not mean constant downpours. Typical mornings are sunny, with clouds building by midday and rain arriving in the late afternoon or early evening. Temperatures range from the low 70s to mid 80s Fahrenheit (low 20s to low 30s Celsius).

Pack a light rain jacket or poncho, quick dry clothing, and sturdy waterproof shoes or sandals with good grip. A dry bag for electronics is smart. Sunscreen and insect repellent are still essential, especially for morning hikes.

Best activities in the green summer

Morning is the golden window for outdoor adventures. Hiking trails in Arenal Volcano National Park are less crowded, and the cloud forest around Mistico is alive with birds and butterflies. The La Fortuna Waterfall flows powerfully in these months, and the pool at its base is refreshing after the short hike down.

For a unique experience, visit Rio Celeste in Tenorio Volcano National Park. The river’s famous turquoise color is most vivid during the rainy season. Go early to avoid the afternoon showers. Hot springs around the area are especially pleasant on a drizzly evening, as the warm water contrasts with the cool air.

Wildlife spotting tips

Green summer is prime time for wildlife. Howler monkeys, white faced capuchins, and sloths are active, and the foliage is dense, so listen for rustling leaves. Guided night walks are excellent for seeing frogs, snakes, and insects. Bring a flashlight or headlamp.

Birdwatchers will enjoy the variety of toucans, motmots, and tanagers. The rain brings out more insects, which in turn attracts more birds. Early morning tours from 5:30 to 7:00 a.m. offer the best sightings.

Road and travel considerations

Roads to and around Arenal are paved and generally in good condition, but some secondary roads may have mud or potholes. A standard rental car with good tires is fine. Allow extra travel time, especially if driving from San Jose or Liberia. The drive from San Jose takes about 3 to 4 hours. Always check weather forecasts before heading to remote areas.

Why choose green summer over dry season

The dry season from December to April brings guaranteed sun but also higher prices and more crowds. Green summer offers a more relaxed pace. You will often have trails and viewpoints to yourself. The rainforest is at its lushest, and the sound of rushing water is everywhere. Many visitors find the afternoon rain a welcome excuse to rest or soak in hot springs.

Your next step

Check the weather forecast a few days before your trip and plan your mornings for outdoor activities. Book your accommodation early, as June through August is still popular with families and budget travelers. Then pack your rain gear and get ready for the greenest, most vibrant version of Arenal.