If you’re planning a Costa Rica trip from the U.S., one question keeps coming up: when is the best time to visit Manuel Antonio National Park? The honest answer is that there’s no bad time — this stretch of Pacific coast is warm, green and full of wildlife all year. But each season has its own personality, and picking the right window can mean the difference between sharing a trail with a crowd and having a troop of monkeys almost to yourself. Here’s exactly what to expect month by month.

Manuel Antonio Weather: The Two Seasons

Costa Rica doesn’t have spring, summer, winter and fall. It has two seasons, and understanding them is the key to timing your trip.

Dry Season (December–April)

This is the classic “postcard” window: mostly sunny days, low humidity and temperatures from 75°F to 90°F (24–32°C). Trails are dry and easy to hike, the ocean is calm and clear for snorkeling, and with less foliage on the trees, wildlife is often easier to spot near the trails and water sources. The trade-off? These are the busiest and priciest months. Christmas, New Year’s and Easter (Semana Santa) week book out fastest, so reserve your tours and park entry weeks ahead.

Green Season (May–November)

Don’t let the phrase “rainy season” scare you off. Most green-season days follow a reliable rhythm: bright, clear mornings followed by a warm afternoon shower that freshens everything up. You get lush jungle, fewer crowds and lower prices — plus a noticeable jump in activity from birds, frogs and reptiles. If you start early (the way our tours do), you’ll often be back before the rain even thinks about arriving.

Best Time for Wildlife in Manuel Antonio

Wildlife is the real reason most travelers come, so here’s how the calendar plays out for the animals on your bucket list.

  • Sloths, monkeys and toucans: Present year-round. Early morning is always the best time to see them, regardless of season.
  • Endangered squirrel monkeys (mono tití): These tiny, hyperactive monkeys live only in this corner of Costa Rica. They’re the hardest species to find — independent visitors spot them on just 20–30% of visits, but that jumps to 50–60% with a guide who tracks the troops’ recent movements.
  • Birds: Peak birdwatching runs December through March, when resident species are joined by migratory birds from North America — a paradise for photographers on a dedicated birdwatching tour.
  • Frogs and reptiles: The green season (especially the wetter months of September–November) brings amphibians and reptiles to life, ideal for a night walk.

Whale Watching Season in Manuel Antonio

Here’s a secret that makes the “off” season anything but: Manuel Antonio has one of the longest humpback whale seasons on Earth. Two separate populations pass by, so sightings are possible during two windows:

  • July–November (Southern Hemisphere humpbacks) — the longer, more reliable season
  • December–April (Northern Hemisphere humpbacks)

August through October offers the highest odds of close encounters, when mothers and calves cruise the warm Pacific waters just offshore. If a whale-and-dolphin boat trip is on your list, this green-season window is prime time — one more reason not to write off the “rainy” months.

When Is Manuel Antonio National Park Closed?

This is the single most important planning detail, and it trips up first-time visitors constantly:

⚠️ Manuel Antonio National Park is closed every Tuesday, all year. Build your itinerary around it.

The park also runs on timed entry slots (7:00, 7:30, 10:00 AM, 12:30 and 1:00 PM), and daily capacity is capped at roughly 1,200 visitors — which sells out in high season. In 2026, park entrance is $18 for adults, $5 for kids ages 2–12, and free for under 2. Booking a guided Manuel Antonio National Park tour takes the guesswork out of slots, tickets and passport paperwork so you can just show up and enjoy it.

Month-by-Month at a Glance

  • December–February: Peak dry season. Best weather, best bird migration, biggest crowds and prices. Book early.
  • March–April: Still dry and sunny, Easter week is very busy, then crowds ease toward late April.
  • May–June: The green season begins — great value, lush scenery, sunny mornings, and thinner crowds.
  • July–August: Whale season kicks off and North American families travel; a sweet spot of good wildlife and manageable crowds.
  • September–October: The quietest, greenest, most affordable months — and the peak of whale watching. A favorite for travelers in the know.
  • November: The rain tapers off, the jungle is at its greenest, and high-season prices haven’t returned yet.

So, When Should You Go?

If you want guaranteed sunshine and don’t mind crowds or higher prices, aim for December to April. If you’d rather trade a few afternoon showers for lush scenery, whale sightings, lower prices and quiet trails, the green season (May–November) is a genuinely fantastic — and underrated — time to visit.

Whichever month you choose, two things stay true: start early, and go with a local naturalist. Solo visitors spot only 20–30% of the wildlife around them, while a certified guide with a high-powered spotting scope pushes that to 70–95%. Every Wakoo Tours guide carries a Swarovski spotting scope, is ICT-certified, and sends you free 4K photos and video of everything you saw. Want the trails to yourself no matter the season? Our private VIP wildlife tour includes park entry and pro photography, and the Damas mangrove tour adds a whole second ecosystem to your trip.

And because every guest matters beyond their visit, each Wakoo tour donates $2 per person to local kids through Kazan Karate for Kids — so whenever you come, your trip gives back.

Not sure which month or which tour fits your trip? Message us on WhatsApp — we reply in under 2 minutes, in any language.