Manuel Antonio in October: Green-Season Weather, Beach Days and Wildlife Walks

In October the hills above Manuel Antonio steam in the morning sun, howler monkeys call from the canopy, and by midafternoon a gray curtain of rain rolls in off the Pacific and drums on every tin roof along the hill road. The forest is at its greenest, the waterfalls behind the beaches run full, and the sand is wide and quiet between showers. October suits anyone seeking jungle, wildlife walks and uncrowded Pacific beaches minus the high-season crowds.

A small cove below the forest at Manuel Antonio in the rainiest months · Illustration

What is the weather like in Manuel Antonio in October?

October is warm, humid and very wet, in the thick of the green season, with rain on nearly every day of the month. Mornings are often the brightest part of the day, and the showers tend to build in the afternoon.

Month	Average high (°F)	Average low (°F)	Rain days	Sea (°F)
September	79.4	70.6	29.4	85.7
October	78.7	70.4	29.9	85.1
November	78.9	70.3	28.8	83.1

A rain day here does not mean a lost day. Many of them bring a short shower or a bit of drizzle, and the heavy ones, roughly a third of the month, usually come as downpours in the afternoon or evening that last a few hours. Of the three months in the table, October brings the most total rain, so expect the sky to be gray more often than in the drier months of the year.

The temperature barely moves from dawn to dusk. Mornings come in gentle and damp, the middle of the day brings heat beneath the canopy, and nights remain mild enough for a T-shirt dinner outdoors, though wind following a storm may feel nicely chilly. Early on, the light comes clear and golden, and once clouds gather over the ridge, it shifts to silvery.

Plan the outdoor things for the morning, such as park trails, a beach walk or a canopy tour, and keep the afternoon loose for a long lunch, a pool or a nap while the rain does its work. Quick-drying clothes matter more than warm ones, and the sea stays as warm as the air.

Can you swim in Manuel Antonio in October?

You can indeed linger in that balmy sea for a long, unhurried dip, and you will not flinch as you step in. Warm water makes it tempting to stay in for hours, but the Pacific here has its own character, and it pays to treat it with respect.

The top picks are the beaches in and next to the national park, arcs of sand with forest behind them, where raccoons and monkeys occasionally roam the shoreline. Playa Espadilla, outside the park, is long and open and has real surf, popular for lessons and board rentals.

The beaches within the park are more sheltered, although waves vary from day to day and after storms the water can turn cloudy. Snorkeling is possible when the water is clear, but October rain can stir up the bottom, so visibility is a matter of luck.

Rip currents along this coast pose a genuine threat, killing several American visitors every year, and most beaches offer no lifeguards and no warnings about hazardous water. If a beach has flags or lifeguards, obey them, and stay out whenever conditions look unsafe. Pack a rash guard to block the sun, plus a dry bag to keep your phone safe.

What to do in Manuel Antonio in October

October 12 is the Day of the Cultures in Costa Rica, and the big celebration around it is the Carnival of Limon on the Caribbean side, with parades, music and Afro-Caribbean food. Manuel Antonio itself does not stage a carnival, so what you find here is a slower, greener rhythm: guides setting up scopes at the trailheads, fruit sellers along the hill road and surf instructors waiting out the next set.

The table is local and simple. For lunch, the usual choice is a casado, the plate that brings rice, beans, plantain, salad and a protein, but the morning starts with gallo pinto, rice and beans cooked together. Along the road you find fresh ceviche, grilled fish, pineapple, mango and coconut water cold from the cooler, all good after a sweaty morning on the trail.

Walking the national park trails

The national park, just south of Quepos, is the reason most people come, and October walking is atmospheric: the leaves drip, the trails smell of wet earth, and the light slants through the canopy.

Plan your park walk for the morning, when wildlife is active and before afternoon rain becomes more likely. A guide makes a big difference here, since sloths in particular are almost impossible to spot unaided, and a good scope shows what the naked eye misses.

Wear shoes with grip, because the paths turn slick after rain. Because the park’s rules, hours and fees can change, look at its official page before you head out.

Beach days between the showers

A good beach day in October starts in the morning, when the sky is most likely to be open and the sand is nearly empty. Spend it at Playa Espadilla for surf and long walks, or inside the park for a sheltered stretch with forest behind your towel. Playa Biesanz, a small cove near the hill road, is a quieter alternative for a gentler outing.

When the clouds darken, head up the road to a terrace restaurant, where the view of the bay turns dramatic as the rain sweeps across the water. Sunsets are often hidden behind cloud this month, but sometimes the sky clears just at the horizon and the light turns orange and pink for a few minutes. It is worth keeping a seat free for that moment.

Mangroves, boats and the forest from above

If you want to see more wildlife without a long hike, a boat trip through the mangroves near Quepos offers a slow look at herons, kingfishers, crabs and sometimes monkeys in the branches. These outings suit families and people who prefer sitting to walking, and the covered boats are handy when the sky turns gray.

Ask the operator how rain changes the day, because lightning and heavy storms can pause activities. Afternoon spas, chocolate tastings and cooking classes fill the indoor hours well.

A two-day itinerary for Manuel Antonio in October

Day 1. Start early with a guided walk in the national park, when the monkeys are moving and the trails are still dry underfoot. Daylight lasts about twelve hours this month, so the first hours are precious. Swim in a sheltered beach inside the park, then eat a casado at a simple place by the park entrance, a kind of family-run restaurant locals call a soda.

By early afternoon the rain usually arrives, so return to your hotel for a siesta or a swim in the pool. When the downpour eases, walk the hill road for fruit stands and craft stalls, then settle on a terrace to watch the light change over the bay. Dinner can be grilled fish at a restaurant with a view.

Day 2. Spend the morning on the open sand of Playa Espadilla, with a surf lesson if the waves are right, or a long walk and a dip near the shore, following any flags. Lunch is ceviche and fresh juice at a beach shack, followed by a visit to Playa Biesanz or a quiet hour with a book.

Before a mangrove boat trip near Quepos, ask the operator whether the afternoon conditions are suitable. Should the downpour pick up, a chocolate tour, a cooking class or a spa session can serve as your backup, since each one keeps you dry. Finish with dinner in Quepos, where small restaurants serve seafood, rice dishes and cold local beer.

Is Manuel Antonio busy in October?

No, October is one of the quieter months here, because the green season keeps many travelers away. Trails are less crowded, beaches have space to spare, and tables at the better restaurants are usually easy to find.

The visitors who do come are mostly independent travelers, couples, birdwatchers and surfers who like the empty lineups. There are no big school-break crowds to fight, and the Day of the Cultures draws celebrations toward the Caribbean coast rather than here. A long weekend around that date can bring a few more Costa Rican families to the coast, though it rarely changes the feel of the place.

Finding a place to stay is simpler than during the dry months, and plenty of hotels drop their prices, which means you can wait to reserve and stay open about your plans. Still, the best small hotels with views book up first, so reserve those early as a habit, and leave the rest for closer to your date.

Confirm the park’s reservation procedure on its official SINAC page, and book a guide separately if you want one. Before you build the day around a park visit, look at the official page, and have your hotel verify any tour that hinges on the weather.

What to pack for Manuel Antonio in October

Think light, quick-drying and ready for sudden rain, with a small bag you can keep dry.

Pack a lightweight rain jacket or poncho, since showers come on quickly in the afternoon.
Shoes with grip for muddy park trails, plus sandals for the beach.
A dry bag for your phone, camera and passport during storms.
Because the morning sun beats down whenever the clouds break, pack sunscreen and a hat.
Binoculars, which help you spot sloths and birds in the canopy.
Bring bug spray for the woods and after dark.

Good to know before you go

The U.S. State Department rates Costa Rica Level 2, ‘Exercise increased caution,’ due to crime; it says petty crime is common throughout Costa Rica and that violent crime also affects tourists, including armed robbery, homicide and sexual assault.

October is the heart of the green season, so the day is best planned around the weather: outdoor things in the morning, rest and indoor plans in the afternoon. Ask your hotel about current road conditions and local transportation before setting out in heavy rain. Keep an eye on the sky before heading out on a boat or zip line, and ask your hotel about the day’s conditions.

Manuel Antonio in October vs September and November

Moving a month earlier gives you almost the same weather, with slightly warmer sea and a little less rain, but also a similar quiet. September is a fine choice if you want the same green, empty feel and a touch more sunshine.

A month later, the rain begins to ease and the sea cools a bit, though it stays pleasantly warm. As November gets closer, more visitors come in, rain falls as brief showers along with the occasional wetter stretch, and the busier mood in restaurants and hotels slowly comes back.

Choose October if you want the lowest crowds and the lushest forest and do not mind the rain. Shift to November if you want a slightly better chance of clear afternoons, or to September if you want the warmest water with the same peaceful pace.

Is October a good time to visit Manuel Antonio?

If you care more about a lush, peaceful shoreline than about surefire sun, October works well for you. It suits wildlife lovers, photographers, surfers and anyone happy to plan mornings outdoors and afternoons under a roof.

It is a poorer fit for travelers who want a dry beach week, a reliable sunset every evening or a long boat day without interruptions. If your days are built around an uninterrupted sun, another month will serve you better.

On arrival, book your guided park walk first, since that is the experience the month rewards most, then fill the rest of the days around the weather. Keep rain gear within reach, swim only where conditions look right and follow any flags. What is special about October here is the forest itself: loud with frogs and birds, dripping and bright, with the beaches almost to yourself and the sea warm enough to stay in until the next cloud rolls in.

Sources

Open-Meteo / ECMWF ERA5, normals 1991-2020 computed for the grid cell at 9.392N 84.1366W, checked October 8, 2026
Open-Meteo Marine API, average 2015-2024, checked October 8, 2026
sunrise-sunset.org, sunrise and sunset calculated for the 15th of the month, checked October 8, 2026
U.S. Department of State, Costa Rica Travel Information, Safety and security (https://travel.state.gov/content/travel/en/international-travel/International-Travel-Country-Information-Pages/CostaRica.html), checked October 8, 2026
U.S. Department of State, Costa Rica Travel Advisory, issued April 1, 2026 (https://travel.state.gov/content/travel/en/traveladvisories/traveladvisories/costa-rica-travel-advisory.html), read via the State Department open data API on October 8, 2026