If you are planning a vacation to Arenal Volcano National Park and the La Fortuna area in June, July, or August, one of the first questions you will probably ask is: What is the weather like during those months? This is a very smart question, because weather plays a major role in how you plan your activities, what you pack, and how you experience this lush and dramatic part of Costa Rica.
The short answer is this: yes, it is rainy—but yes, you should absolutely still go. In fact, many experienced travelers will tell you that visiting Arenal during these months can be one of the most rewarding times of the year.
Let’s take a deeper look at what the weather is really like during June, July, and August, what you can expect day to day, and how to make the most of your visit despite—or rather, because of—the rain.
Understanding Arenal’s Climate
The Arenal Volcano region sits in a tropical rain forest zone, and its weather is quite different from other parts of Costa Rica such as Guanacaste or the Central Valley. Arenal receives significantly more rainfall, and this is exactly why the region is so extraordinarily green, fertile, and full of life.
Thanks to the rain, the surrounding countryside is covered with:
- Lush rain forest
- Papaya and pineapple plantations
- Yucca and sugarcane fields
- Ornamental flower farms bursting with color
The combination of heavy rainfall, rich volcanic soil, and strong tropical sunshine creates one of the most biologically diverse landscapes in the country.
June, July, and August: Costa Rica’s Green Season
These three months fall within what is commonly called Costa Rica’s Green Season (sometimes referred to as the rainy season). While the word “rainy” might sound discouraging, the reality is far more nuanced.
What the Rain Is Really Like
Rain in the Arenal area is:
- Unpredictable
- Often localized
- Usually short and intense, rather than all-day downpours
It is extremely rare for it to rain nonstop from morning to night. Instead, rain often follows a pattern:
- Sunny or partly cloudy mornings
- Rain showers developing in the afternoon or evening
- Clear or misty nights
This rhythm allows you to plan activities strategically and still enjoy everything Arenal has to offer.
Month-by-Month Breakdown
June Weather at Arenal
June marks the beginning of the Green Season, but it is one of the best months to visit Arenal.
- Rainfall increases compared to April and May, but it is still moderate
- Mornings are often sunny with good visibility of the volcano
- Vegetation is freshly green and vibrant
- Wildlife activity increases as food becomes more abundant
June is also a great time for photography. The contrast between dark volcanic rock, bright green foliage, and dramatic skies creates stunning images.
July Weather at Arenal
July is interesting because it often brings a short break in rainfall known locally as the “Veranillo de San Juan” or “Little Summer.”
- Rainfall may decrease slightly compared to June
- Days often alternate between sunny and rainy
- Humidity increases, making the forest feel especially alive
- Rivers and waterfalls are flowing beautifully
July is an excellent month for travelers who want fewer crowds but still relatively favorable weather.
August Weather at Arenal
August typically sees more rainfall than June or July, but again, rain rarely lasts all day.
- Afternoon showers are more common
- Mornings are still your best window for clear views
- Forests are at peak lushness
- Fewer tourists mean quieter trails and better deals on accommodations
If you don’t mind carrying a rain jacket and adjusting your schedule slightly, August can be deeply rewarding.
Best Time of Day to Enjoy Arenal
Regardless of the month, one rule always applies in Arenal:
Get Up Early
The sun rises around 5:30 a.m., and early mornings are the best time to experience the volcano and surrounding rain forest.
In the early hours:
- The summit of Arenal is more likely to be visible
- Cloud cover usually hasn’t settled in yet
- You may see smoke plumes or hear rumbling from the volcano
- Tropical birds are most active
- Howler monkeys announce the morning with their unforgettable calls
By late morning or early afternoon, clouds often drift in and wrap the volcano in mist. While this can be atmospheric and beautiful in its own way, early risers are rewarded with the clearest views.
How Rain Enhances the Experience
Rain is not an inconvenience in Arenal—it is part of the magic.
Wildlife Activity
Rain brings life to the forest. Frogs, insects, birds, and mammals are more active during these months. You are far more likely to see:
- Tree frogs
- Sloths
- Toucans
- Poison dart frogs
- Butterflies and tropical insects
Waterfalls and Rivers
In June, July, and August, waterfalls are powerful and dramatic. Rivers run high and full, creating stunning scenery and excellent conditions for:
- River floats
- White-water rafting
- Waterfall hikes
Hot Springs
There is nothing quite like soaking in natural hot springs while warm rain falls gently around you. The contrast between cool rain and hot mineral water is unforgettable—and something you can only truly enjoy during the Green Season.
What to Pack for These Months
Being prepared makes all the difference. Here’s what you should bring:
- Lightweight rain jacket or poncho
- Compact umbrella
- Quick-dry clothing
- Waterproof hiking shoes or sandals
- Extra socks
- A small backpack with rain cover
Don’t worry about dressing up—Arenal is casual, comfortable, and outdoors-focused.
Crowds, Prices, and Atmosphere
Another major advantage of traveling in June, July, or August is that these months are less crowded than the peak dry season (December through April).
Benefits include:
- Better hotel availability
- Lower prices and seasonal discounts
- Easier access to tours and guides
- A more relaxed, authentic atmosphere
Tour operators, guides, and hotel staff often have more time to engage personally with guests during these months.
Should You Visit Arenal in June, July, or August?
Absolutely yes.
If you are willing to:
- Embrace a bit of rain
- Wake up early
- Pack appropriately
- Be flexible with your schedule
You will be rewarded with:
- Incredible scenery
- Lush rain forest landscapes
- Abundant wildlife
- Fewer crowds
- A deeper connection to nature
The rain is precisely what makes Arenal one of the most beautiful places in Costa Rica.
Final Thoughts
Weather at Arenal Volcano National Park in June, July, and August is part of the destination’s identity. The mist, rain, and dramatic skies add mystery and beauty that you simply don’t experience during the dry months.
So pack your rain jacket, don’t fear the clouds, and let the rhythm of the rain forest guide your days. Wake early, explore deeply, relax in hot springs, and enjoy the sights and sounds that only the Green Season can offer.
P.S. The hundreds of colorful tropical flowering plants you see throughout the Arenal and La Fortuna area exist because of this very weather—heavy rainfall, rich volcanic soil, and strong tropical sunshine working together in perfect harmony.
If you have a great story about your visit to Arenal Volcano National Park and La Fortuna during June, July, or August, I would love to share it with my readers. Just click “Comment” or “Reply” at the end of this post and tell us about your experience.