Corcovado National Park is one of those rare places where the time of year you visit can shape your entire experience. The trails change, the wildlife shifts its behavior, and the jungle itself transforms between seasons. Whether you are planning a Corcovado Sirena Station day trip or a multi day adventure on the Osa Peninsula, choosing the right month matters more than you might think.
The short answer? There is no single “best” time. Each season brings something unique. Here is what you can expect throughout the year so you can pick the window that fits your priorities.
Dry Season: December to April
The dry season is the most popular time to visit Corcovado, and for good reason. Rainfall drops significantly, the trails are firmer and easier to navigate, and the sunny weather makes long hikes much more comfortable. If this is your first time visiting a tropical rainforest and you want the most predictable conditions, this is your safest bet.
December and January mark the beginning of the dry season and coincide with peak tourist season in Costa Rica. Lodges in Drake Bay fill up quickly, and Corcovado tours can sell out weeks in advance, especially around Christmas and New Year. Booking early is essential during these months.
February and March are often considered the sweet spot. The weather is reliably dry, temperatures are warm but manageable (averaging 27°C to 32°C), and while there are still visitors, the holiday rush has passed. Wildlife is very active because water sources in the forest become concentrated, drawing animals to predictable locations. This makes spotting monkeys, tapirs, and birds much easier for your guide.
April is the transition month. The first rains start to appear, usually as brief afternoon showers, but most days are still sunny in the morning. It is an excellent time to visit if you want good weather with fewer crowds and slightly lower lodge prices.
During the dry season, the Sirena Station day trip is at its most accessible. Trails are dry, river crossings are shallow, and you can hike comfortably in trail shoes rather than rubber boots.
Green Season: May to August
Locals call it the “green season” rather than the rainy season, and once you see Corcovado during these months, you will understand why. The jungle explodes with new growth, waterfalls surge, and the entire landscape turns an almost impossibly vivid shade of green.
Rain during these months typically follows a pattern: mornings are clear and sunny, and the heavy showers roll in during the afternoon, usually between 1:00 PM and 4:00 PM. Most Corcovado tours from Drake Bay depart early in the morning, which means you often complete the best part of your hike before the rain arrives.
One of the biggest advantages of the green season is wildlife. Many experienced naturalist guides will tell you that some of the best animal encounters happen during the wetter months. Frogs become incredibly active. Snakes are more visible. Insects emerge in spectacular numbers, which in turn draws birds and mammals. If you are a wildlife photography enthusiast, the green season offers opportunities that the dry months simply cannot match.
May and June are the mildest of the wet months. Rain is present but not overwhelming. Lodge prices drop significantly compared to the dry season, and you will share the trails with far fewer people. This is a fantastic time for a nocturnal wildlife tour, as the increased humidity brings out an astonishing variety of frogs, insects, and nocturnal mammals.
July and August see heavier rain, but the mornings remain surprisingly clear. The trails get muddier, and rubber boots become your best friend (you can rent them at the ranger station). The reduced visitor numbers mean a more intimate experience with the forest. You might have entire stretches of trail to yourself.
The Wet Months: September and October
September and October are the wettest months on the Osa Peninsula, and this is the one period where visiting requires extra consideration. Corcovado National Park closes its trails during October for annual maintenance, and some lodges in Drake Bay shut down as well.
September is still technically open, but rain can be heavy and sustained. Some trails may be impassable, and boat rides from Sierpe to Drake Bay can be rougher due to swollen rivers and bigger ocean swells. If you are an experienced traveler who does not mind getting thoroughly soaked and you want the most adventurous version of this trip, September can be rewarding. But for most visitors, it is better to plan around these two months.
November: The Transition Back
November is one of the most underrated months to visit Corcovado. The heavy rains start to ease, the park reopens after October maintenance, and the forest is at peak lushness from months of rainfall. Lodge prices are still at green season rates, and the trails are quiet.
The wildlife during November can be extraordinary. Animals that retreated deeper into the forest during the heaviest rains start moving back toward the trails and water sources. Bird activity picks up as migratory species begin arriving. A Caño Island snorkeling trip in November often rewards you with excellent underwater visibility as the ocean settles after the rainy season.
Wildlife Calendar: What You Can See and When
Different animals are more active in different seasons, so your priorities might help you decide when to visit.
Scarlet macaws are visible year round in Corcovado, but they are especially easy to spot from December to April when they feed on almond trees along the coast.
All four monkey species (squirrel, howler, spider, and white faced capuchin) are active throughout the year. The dry season concentrates them around water sources, making sightings more frequent and predictable.
Tapirs are more commonly spotted during the wetter months when they move through the forest more freely. Many of the most memorable tapir encounters reported by our guides have happened between June and August.
Whales visit the waters near Drake Bay twice a year. Humpback whales from the southern hemisphere arrive between July and October, and those from the northern hemisphere pass through from December to March. A boat tour to Caño Island during whale season often includes incredible sightings along the way.
Frogs and reptiles are at their most active during the green season, making the Night Walk tour especially rewarding between May and August. The red eyed tree frog, poison dart frogs, and eyelash vipers are much easier to find when humidity is high.
For a complete list of the animals you might encounter, check our Corcovado wildlife guide.
Practical Considerations by Season
Prices and availability: The dry season (December to April) is the most expensive and busiest. Green season (May to November, excluding October) offers significantly lower prices for lodges and sometimes for tours. The savings can be substantial, often 30% to 40% less than peak season rates.
What to wear: During the dry season, lightweight hiking shoes and breathable clothing are usually sufficient. In the green season, rubber boots and a rain jacket become essential. Our Drake Bay packing list covers everything you need for either season.
Trail conditions: Dry season trails are firm and fast. Green season trails can be muddy and slippery, adding time and effort to your hike. The Sirena trail from Drake Bay is doable year round, but the experience is quite different depending on the month.
Boat transfers: The boat ride from Sierpe to Drake Bay can be rough during the wetter months. If you are prone to seasickness, the dry season offers calmer waters. Flying into Drake Bay’s small airstrip is an alternative that avoids the boat entirely.
Our Recommendation
If you have flexibility, February and March offer the best overall combination of good weather, active wildlife, and reasonable availability. If you are on a budget and do not mind some rain, May, June, or November give you a quieter, greener, and more affordable experience with outstanding wildlife opportunities.
No matter when you visit, Corcovado will impress you. This is the most biodiverse place on Earth per square meter, and every season reveals a different facet of its extraordinary nature.
Ready to plan your visit? Browse our tours page to see what is available, or check our Drake Bay travel guide for everything you need to know about getting here and where to stay.
GoCorcovado is based in Bahía Drake, Costa Rica. Our certified naturalist guides lead daily tours to Corcovado National Park, Caño Island, and the wildlife rich forests of the Osa Peninsula. Get in touch to plan your trip.