Costa Rica in October: Green-Season Weather, Limon Carnival and Where to Go

In October, the Caribbean port of Limon fills with drums, costumes and the smell of rice and beans simmering in coconut milk as Carnival rolls through the streets. Beyond that, the volcanoes gather clouds by noon, the hills reach their fullest green, and the beaches stretch out broad and hushed. This is Costa Rica deep in its green season, a month for rainforest walks, waterfalls, cloud forest and long lunches under a roof while the afternoon rain drums on it.

Green hills and a volcano in Costa Rica in the rainiest months · Illustration

What is the weather like in Costa Rica in October?

October brings warmth, damp air, and rain to just about every corner of Costa Rica: the Pacific side and the Central Valley see the green season at its peak, the mountains stay cooler and often vanish into cloud, and the Caribbean side keeps a wetness that is entirely its own. Mornings can be bright, but you should plan every day around the chance of rain.

Place	Region	Average high (°F)	Average low (°F)	Rain (in)	Rain days
San Jose	Central Valley	74.4	63.8	16.99	26.8
Monteverde	Northern mountains	74.3	65.2	15.69	23.9
Tamarindo	North Pacific coast	82.5	75.5	15.00	24.8
Manuel Antonio	Central Pacific coast	78.7	70.4	38.03	29.9
Puerto Viejo de Talamanca	Caribbean coast	81.3	72.3	14.72	26.3

The contrasts follow the mountains. San Jose and Monteverde sit high enough that afternoons feel comfortable rather than hot, and evenings call for a light layer, especially in the cloud forest. Tamarindo, on the northern Pacific coast, is the hottest and stickiest of the five, with nights that hardly cool down, and the sea there is bathwater warm at around 85 degrees.

Manuel Antonio is the one to watch: it gets more than double the rain of Tamarindo, and nearly twelve days in the month bring a downpour of an inch or more. The sea there is still warm, near 85 degrees.

Puerto Viejo, on the Caribbean side, has the warmest water of the group at almost 87 degrees. Its rain is steadier and less tied to the afternoon than on the Pacific, so a clear morning is not a guarantee of anything.

Where to go in Costa Rica in October

The Caribbean coast

Limon and Puerto Viejo de Talamanca bring Carnival culture and beaches, while Tortuguero’s canals and wildlife offer another major Caribbean experience. Rain falls on the Caribbean throughout the year, and the Pacific calendar does not govern it, which means October is not a clear move toward days that are drier or wetter. Between showers you find black-sand beaches, bike rides along the jungle road, chocolate farms and Afro-Caribbean kitchens serving rice and beans, patties and fish in coconut sauce.

This is the coast for the Limon Carnival around the middle of the month. Puerto Viejo suits travelers who like a relaxed, barefoot town with reggae in the evening and surf breaks nearby. The sea can be rough, rip currents are very dangerous, and most beaches have no lifeguards or warnings about unsafe conditions. The Atlantic hurricane season is still running, which is a reason to keep plans flexible here.

The Pacific coast

On the Pacific side October is the heart of the green season, and the contrast between the north and the center is real. In the area of Tamarindo and the Guanacaste beaches, the landscape is green and full, the sand is almost deserted, and sunsets across the water can remain stunning once the clouds break. The closest airport is Liberia.

Farther south, Manuel Antonio is wetter, and its jungle trails, with monkeys, birds and the occasional sloth, are beautiful under heavy greenery. Rain is usually an afternoon affair, so mornings are the time for the beach. On Pacific beaches rip currents pose a serious hazard, and since most lack lifeguards or posted warnings while conditions shift daily, check with your hotel or a surf school and keep children close enough to grab.

The central highlands and cloud forest

San Jose and the Central Valley are cool and green in October, with rain that usually arrives in the afternoon. It is a good month for coffee farms, markets, museums and cafés in the capital, and for day trips to the volcanoes. Above the valley you’ll find Poas and Irazu, while Arenal looms close to La Fortuna, yet by noon the clouds tend to cover the peak, so head out early and count any glimpse as a gift.

Monteverde is at home in this weather. The cloud forest drips, hummingbirds work the flowers, and hanging bridges disappear into mist. Pack a jacket, because the evenings feel properly cool. Walks with a guide are how most visitors spot quetzals, frogs and other wildlife, though nothing is guaranteed.

What to do in Costa Rica in October

Carnival in Limon

The big event of the month is Limon’s Carnival, held around October 12, the Day of the Cultures. Parades of dancers and costumed groups move through the port to the beat of calypso and reggae, and street stalls sell Afro-Caribbean food, from rice and beans to spicy stews and sweets. The dates can shift from year to year, and October 12 is not a fixed day off for everyone, so confirm the schedule locally.

If you go, wear light, quick-drying clothes and be ready for sun and rain within the same hour. Carnival is loud and crowded, a good fit for travelers who like a street party rather than a quiet beach. Keep valuables close, as petty crime is common throughout the country.

Green-season days: forest, waterfalls and coffee

With so much rain, October is the month of rivers running full and waterfalls at full strength. Rainforest walks are muddy and rich with sound, and the best plan is to start early, spend the morning outside and keep the afternoon for something under cover. A coffee farm tour in the highlands, a chocolate tasting on the Caribbean side or a cooking class with a casado (the classic plate of rice, beans, salad, plantain and a meat or fish) all fit that rhythm.

On the coast, surf lessons, boat trips and snorkeling are possible when the weather cooperates, with warm water most days. Wildlife sightings on guided walks, from monkeys to birds, are chances rather than promises. On a gray afternoon, the cafés and small restaurants of San Jose or Puerto Viejo are a pleasant refuge.

Is Costa Rica busy in October?

No, October is one of the quieter months of the year for most of the country, because it falls in the middle of the rainy season. Beaches have room to spare, trails are less crowded, and rooms are easier to find than in the dry months, when the Pacific side is full.

The exception is Limon around the Carnival, when the port and nearby Caribbean towns fill with Costa Ricans and visitors. Elsewhere, the busiest spots are the famous ones: Manuel Antonio, La Fortuna and Monteverde still draw tour groups, though with fewer people than at other times. Weekends bring local families to the beaches, while weekdays feel calmer.

Many travelers like this trade. You give up some sunshine and gain empty trails, green hillsides and a slower pace in the towns. Flexible travelers, and those who enjoy being outdoors in the morning and indoors in the afternoon, are the ones who get the most from the month.

What to pack for Costa Rica in October

Packing changes with altitude and coast: light, quick-drying clothes for the hot, humid beaches, and a warmer layer for Monteverde, the volcanoes and San Jose in the evening. Rain gear matters everywhere, and sturdy shoes with grip help on wet trails.

A light rain jacket or poncho that packs small, for the afternoon showers.
Quick-drying shirts and shorts, since clothes dry slowly in the humidity.
Closed shoes with good tread for muddy forest trails, plus sandals for the beach.
A fleece or sweater for the cloud forest and cool highland evenings.
Sunscreen and insect repellent, because the sun is strong between clouds and the forest has mosquitoes.
A waterproof bag or cover to keep your phone and passport dry.

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.

The Atlantic hurricane season, which covers the Caribbean Sea, runs from June 1 to November 30, and most activity happens between mid-August and mid-October, so October still sits inside it. Rain can be heavy on both coasts, and trips are easier with flexible bookings.

The U.S. State Department rates Costa Rica Level 2, exercise increased caution, because of crime, and it advises checking the guidance for each region before you travel. Petty crime is common, so keep belongings close.

Is October a good time to visit Costa Rica?

October is a good time for travelers who love green landscapes, quiet trails and cultural events and who accept daily rain, with the cloud forest of Monteverde and the Caribbean town of Limon the best fits this month. The north Pacific coast around Tamarindo is also a reasonable choice, since it is far drier than Manuel Antonio, which takes the heaviest rain.

Compared with September, October is similar in feel, a green and rainy month with a slower tourist pace, though it is still inside the stretch when Atlantic storm activity is highest. November moves toward the end of the rainy season, and the Pacific side and the Central Valley begin to look forward to the dry months that start in December. October is therefore the deep end of the green season, when the landscape is most lush and the country is at its quietest.

What is special about the month is the mix: Carnival drums in Limon, rivers running full, mist in the mountains and warm sea along the coasts. It rewards travelers who plan around the weather rather than against it, with mornings outdoors and afternoons over coffee or a plate of gallo pinto, the rice-and-beans breakfast that fuels the day.

Sources

Open-Meteo / ECMWF ERA5, normals 1991-2020 computed for the grid cell at 9.9281N 84.0907W, checked October 8, 2026
Open-Meteo / ECMWF ERA5, normals 1991-2020 computed for the grid cell at 10.3009N 84.8248W, checked October 8, 2026
Open-Meteo / ECMWF ERA5, normals 1991-2020 computed for the grid cell at 10.2993N 85.8371W, checked October 8, 2026
Open-Meteo Marine API, average 2015-2024, checked October 8, 2026
Open-Meteo / ECMWF ERA5, normals 1991-2020 computed for the grid cell at 9.392N 84.1366W, checked October 8, 2026
Open-Meteo / ECMWF ERA5, normals 1991-2020 computed for the grid cell at 9.6558N 82.7541W, 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
NOAA National Hurricane Center, Climatology (https://www.nhc.noaa.gov/climo/), 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
U.S. Department of State, Costa Rica Travel Information, Entry and exit requirements (https://travel.state.gov/content/travel/en/international-travel/International-Travel-Country-Information-Pages/CostaRica.html), checked October 8, 2026