Why Arenal’s Waterfalls Are Even Better in the Green Season

Arenal's famous waterfalls are spectacular year-round, but they are at their most powerful and dramatic during the green season (May through November). The consistent afternoon rains feed the rivers, creating fuller, more thunderous cascades and making the surrounding rainforest exceptionally lush and vibrant. It's the best time to witness their true force.

What the Green Season is Really Like

Many visitors hear “rainy season” and picture non-stop, week-long downpours. That couldn't be further from the truth here in the northern lowlands. As we write this, we’re deep in the heart of the green season, and it’s beautiful.

A typical day involves bright, sunny mornings perfect for getting out and exploring. The air is fresh and clear. Around 2 or 3 p.m., the clouds often gather for a refreshing afternoon shower that might last for an hour or two. It’s the perfect excuse for a nap in the hammock on our deck, a hot cup of local coffee, or a visit to a hot spring. The rain rarely disrupts an entire day; it just punctuates it.

This predictable pattern makes it easy to plan your adventures. Head out early for a big hike, and be back at your home base by mid-afternoon as the cooling rains arrive. It's a rhythm you quickly get used to, and one that makes the whole country feel alive.

La Fortuna Waterfall: A Roaring Giant

The most iconic waterfall in the area, La Fortuna Waterfall, is a force of nature in the green season. The extra water transforms it from a beautiful cascade into a thundering spectacle that you can hear long before you see it. The mist billows up from the base, and the sheer volume of water is something to behold.

To reach the base, you’ll descend about 500 steps. Be prepared for a workout on the way back up! In the green season, these steps can be slick, so sturdy, closed-toe shoes with good grip are essential. While swimming is sometimes possible at the base, authorities will close the swimming area if the current is too strong, which is more common during these months. Even if you can't swim, the view from the lookout platforms is more than worth the visit.

Río Celeste: The Challenge and the Reward

Visiting Tenorio Volcano National Park to see the legendary turquoise river, Río Celeste, during the green season comes with a small caveat and a big reward. The caveat: a very heavy, prolonged storm can sometimes dilute the minerals that create the otherworldly blue color, turning the water brownish for a few hours. The reward: for most of the season, the river is full and the color is incredibly intense against the vibrant green forest.

Our advice? Don't be deterred. The trails are muddier, so proper hiking shoes are a must, but the forest is magical. Check the park's status before you go (local guides or hotel desks in the area often have recent reports) and aim for a morning visit after a relatively dry night. The drive from the Arenal area makes an early start easy. When you see that celestial blue for yourself, you'll know the effort was worth it.

The sound of the rainforest is different in the green season—louder, richer, and more alive.

Hidden Waterfalls and Fuller Rivers

Beyond the famous names, the green season swells the hundreds of smaller creeks and rivers that crisscross the Arenal region. This is the best time for discovering local swimming holes and cascades that are mere trickles in the dry season. Exploring these requires a bit more local knowledge, but the payoff is a refreshing dip in a place you might have all to yourself.

This is also the absolute best time for river tubing. The fuller rivers make for a faster, more exciting float. Several operators offer tours that are perfect for families. The higher water levels mean you glide smoothly over rocks that might have you getting stuck in March. For more ideas on water activities, check out some of our favorite Arenal adventures.

Practical Tips for Your Green Season Visit

Embracing the green season is all about being prepared. With the right gear and mindset, you'll have an incredible time. Here’s what we always recommend our guests pack for a visit between May and November.

• Waterproof everything: A lightweight rain jacket is non-negotiable. A waterproof dry bag or even a few large Ziploc bags are also crucial for protecting your phone, camera, and wallet during a sudden shower on the trail.
• The right shoes: Bring shoes that can get wet and muddy but still provide good grip. Waterproof hiking boots, trail runners, or sturdy hiking sandals (like Keens or Tevas) are ideal. Leave the flimsy flip-flops for the house.
• Quick-dry clothing: Leave cotton at home. Synthetic fabrics and lightweight wool will dry much faster and keep you more comfortable. Pack an extra change of clothes to leave in the car for after your hike.
• A 4WD vehicle: While not strictly necessary for all main roads, some of the unpaved roads to trailheads and rural spots can get slick and muddy. A 4WD gives you peace of mind and more options. We have a whole guide on whether you need a 4x4 for the Arenal area.
• Insect repellent: More water means more mosquitoes, especially around dawn and dusk. A good repellent is your best friend.

Planning from Casa Venado

Staying in the Venado area offers a great basecamp for waterfall adventures. After a morning spent hiking in the humidity, coming back to the quiet countryside of Venado is a welcome relief. You can watch the afternoon rain clouds roll in over the valley from the comfort of your accommodation's covered deck, listen to the howler monkeys, and plan the next day's outing.

Whether you're tackling the big hikes or simply enjoying the powerful sights and sounds of a country renewed by rain, the green season offers a unique and unforgettable way to see the waterfalls of Arenal. We think it’s the best time to visit, and we’re always happy to share our favorite spots and tips for enjoying this vibrant season.

We hope to welcome you soon!