On a July afternoon in the mountains, the rain arrives on schedule, drumming on tin roofs while steam lifts off the forest and the hummingbirds crowd the feeders. Come back in February and the same hillsides are dusty gold, the beaches of the northwest are packed by noon, and the sky stays blue until the sun drops into the Pacific. Costa Rica runs on this rhythm of a dry season and a green one, with the Caribbean coast keeping a calendar of its own.
When is the best time to visit Costa Rica?
The best time for most travelers is the dry season, from about December to April, when the Pacific coast and the Central Valley see the most sun and the beach days are easiest to plan. It is also the busiest stretch of the year, so the real answer depends on what you want from the trip.
For beaches and the sea, the north Pacific is the safest bet in those dry months. Tamarindo and the Guanacaste coast bake in sunshine from January through April, and a rainy afternoon is a rarity.
Surfers have their own calendar, since the Pacific swell tends to build in the green season, and a beach that is gentle in February can be rowdy in September. On the Caribbean side, Puerto Viejo has no true dry season, but its showers come and go, and you can still spend a good part of a day on the sand in nearly any month.
For sightseeing, volcanoes, cloud forests and wildlife walks, the mornings are what matter. In the green season, clear mornings are common and clouds roll in after lunch, so you plan the early hours for trails and the afternoons for coffee farms, hot springs or a long lunch. Skies are never guaranteed, and a volcano summit can be fogged in on any day of the year.
For a quieter, lower-key trip, the green months from May to November reward flexible travelers. The hills turn a deep emerald, the lodges have more room, and the trails are less crowded. The weeks around September and October are the rainiest on the Pacific side, so that is the time for travelers who mind a wet day less than a full beach.
Families should know that spring break in March is loud. American school groups and families fill the beach towns, the resorts and the tour boats, and the sunniest weeks are also the most crowded ones. If your children are in school in other months, early December or the weeks after Easter bring much of the same dry weather with a calmer feel.
Costa Rica weather by region and season
Costa Rica is a country of two coasts and a spine of volcanic mountains, so it has several climates rather than one, and two places an hour apart can feel like different countries.
| Place | Region | January | April | July | October |
|---|---|---|---|---|---|
| San Jose | Central Valley | 75.9°F, 7.1 rain days | 79.6°F, 10.2 rain days | 75.3°F, 22.6 rain days | 74.4°F, 26.8 rain days |
| Monteverde | Cloud forest highlands | 76.3°F, 2.6 rain days | 81.2°F, 4.2 rain days | 75.7°F, 17.1 rain days | 74.3°F, 23.9 rain days |
| Tamarindo | North Pacific | 88.5°F, 0.4 rain days | 91.6°F, 4.2 rain days | 85.0°F, 18.0 rain days | 82.5°F, 24.8 rain days |
| Manuel Antonio | Central Pacific | 80.4°F, 19.6 rain days | 81.9°F, 22.3 rain days | 79.8°F, 29.9 rain days | 78.7°F, 29.9 rain days |
| Puerto Viejo | Caribbean | 79.2°F, 13.8 rain days | 81.6°F, 14.4 rain days | 81.0°F, 27.8 rain days | 81.3°F, 26.3 rain days |
The contrast between the Caribbean and the northern Pacific is the clearest. Tamarindo is hot and nearly rainless in the first months of the year, then turns green and showery by midyear. Puerto Viejo stays warm and damp in every month shown, and its showers do not follow the Pacific calendar at all, so a gray week there says nothing about the beaches across the mountains.
The central Pacific coast is its own case. Manuel Antonio sits in rainforest, and even its January is a mix of sun and passing showers. By July and October it gets the heaviest rain of any place in the table, with downpours that can last for hours. Its air is milder than Guanacaste’s, which makes the trails more comfortable, but this is a coast to visit with a flexible plan.
The highlands are the cool refuge. San Jose and the Central Valley stay in the pleasant mid-70s to near 80 all year, with cooler nights, and the real change is how much rain falls in the afternoon. Monteverde is drier than the valley in the early months and then catches the mist and showers of the green season, so a light rain jacket belongs in your bag in any month.
What is there to do in Costa Rica in each season?
The dry months, December to April
This is the season for the beach and for long days outdoors. On the Pacific side you surf and swim at Tamarindo and the Nicoya beaches, sail out at sunset, and snorkel or dive off the northern coves. Humpback whales are often seen off the southern Pacific coast around the Marino Ballena area in the early part of the year, a chance rather than a promise, and boat trips there are popular.
Inland, the dry months make the volcano country easier to enjoy. Arenal, Poas and the Rincon de la Vieja area are best on the clear mornings, and hot springs, coffee farms and zip lines fit neatly around them.
The forest is a little drier, and animals often gather at the remaining water, which can help a guided walk. Leave the quiet and the lowest prices for another time, since this is when everyone else has the same idea.
The green months, May to November
The green season is when the country looks its best and feels most like itself. Waterfalls run full, the rainforest is loud with frogs after dark, and rivers are high enough for rafting trips near the Central Valley and on the Caribbean slope. Mornings are often bright, and most of the day’s rain arrives in the afternoon, so you plan hikes and wildlife walks early.
This is also the time for nature seasons. Sea turtles come ashore to nest on both coasts, with the Pacific beaches around Ostional famous for mass nestings in the wetter months, and Tortuguero on the Caribbean side seeing green turtles in the middle of the year.
Humpbacks return to the south Pacific in the second half of the green season. Leave the long beach days for another time, because a rainy afternoon on the central Pacific coast can swallow the whole plan.
Shoulder months and the winter holidays
The shoulder months, late November to early December and the weeks after Easter, bring a good deal of the dry season’s sun with fewer people. The fields are still green from the rains, the rivers are full, and the best lodges are easier to find. It is a smart time for a trip that mixes a volcano, a cloud forest and a few days on the coast.
Christmas and New Year are the peak of the year, and the beach towns fill with families from across the Americas. The days are warm and the lights go up in San Jose, but the trade-off is crowds on the tours and on the most famous trails. If you travel then, pick one or two bases and spend your days on a few well-chosen outings instead of racing around the country.
When is Costa Rica cheapest and least crowded?
The quietest stretch is the green season, especially September and October, when the Pacific side is at its rainiest and many travelers stay home. Lodges and hotels have rooms to spare, trails are calm, and the beaches are wide and nearly empty. Some small places near the coast close for a few weeks, and boat trips and tours can be less frequent, so the quiet comes with a smaller menu of outings.
The peak weeks are easy to name. Christmas and New Year are the busiest, followed by the weeks of spring break in March, when families from across the United States and Canada take over the beach towns. Easter week, which moves each year, is a major vacation for Costa Ricans themselves, and the beaches, buses and roads fill with local families. Rates in those weeks are peak-season rates, and the best rooms go early.
Between those peaks sit calmer windows. January after New Year is sunny and easier than December, the weeks after Easter are pleasant, and the first part of the green season in May and June is lush with fewer crowds.
Midyear brings a modest bump from summer vacations, though it is never the crush of March. Travelers who want the dry season without the people should aim for the edges of it, late November or the weeks after Easter, and pick beaches off the most famous strips.
Which months should you avoid in Costa Rica?
No month is off limits, but September and October are the hardest on a beach trip, especially on the Pacific side, where the rain is heavy and the days are often gray. The Central Pacific coast around Manuel Antonio gets rain on almost every day of those months, and the southern Pacific can see roads and river crossings slowed by it.
The Atlantic hurricane season, which covers the Caribbean Sea, runs from June 1 to November 30. Its peak is around September 10, with most activity between mid-August and mid-October.
That is a reason to watch the forecast for the Caribbean coast in those weeks and to keep your plans flexible, not a reason to cancel. The Pacific rains of the same months come from a different pattern, and they are the bigger factor for most travelers.
Heat is the other consideration. In April the north Pacific is at its hottest, with afternoons well into the 90s and little shade on the beach, so days there start early and finish with a long break at midday. The highlands avoid that, with mild days all year.
For the Caribbean side, no single month is dry. Puerto Viejo has showers in every month shown in the table, so the question is how much you mind them, not when to dodge them. If rain would ruin your trip, build in a few indoor options, such as a chocolate tour, a cooking class or a long lunch, and stay flexible on the beach days.
When can you swim in Costa Rica?
You can swim in Costa Rica in every month, because the sea stays bathwater warm on both coasts through the year.
| Place | January | April | July | October |
|---|---|---|---|---|
| Tamarindo | 83.0°F | 85.2°F | 85.5°F | 85.6°F |
| Manuel Antonio | 85.7°F | 87.6°F | 85.2°F | 85.1°F |
| Puerto Viejo | 83.1°F | 84.8°F | 85.4°F | 86.9°F |
The water is never the question, the surf is. Many Pacific beaches have rip currents, lifeguards are not on every beach, and the waves can build quickly in the green season, so look at the beach flags and ask locals before going in past your knees. A beach that is gentle one week can be rough the next.
By season, the dry months bring the clearest water and the easiest days, with sunshine from the north Pacific down to the Nicoya coves. In the green months the sea is just as warm, but the swim is a morning plan, with the afternoon showers arriving as you dry off. On the Caribbean coast, the water often looks darker and the sand is dark too, and swimming depends more on the day’s surf than on any month.
Festivals and events in Costa Rica through the year
Winter holidays and Easter week
December opens with lights in San Jose, where the city’s festival of lights fills the streets with floats and music in the early part of the month. Christmas, on December 25, is a family holiday, with tamales on the table and nativity scenes in many homes and shops, and New Year follows with parties on the beaches and in town squares.
Easter week, called Semana Santa, moves each year and is the biggest domestic vacation. Processions fill the streets of some towns, while many Costa Ricans head for the coast, so beaches and roads are crowded and rooms are hard to find. If you want a quiet beach in those days, choose carefully, and if you prefer to see the religious side, a colonial-style town in the Central Valley is a better choice.
National days and local fiestas
On July 25, Guanacaste celebrates the day it joined Costa Rica, with parades, folk dances and rodeo-style fairs in towns across the northwest. It is a good moment to see cowboy culture, marimba music and the region’s cooking, and beach towns like Tamarindo have a more local mood around it.
On August 2, pilgrims walk to the basilica in Cartago to honor the Virgin of the Angels, patron of the country, and the roads fill with walkers from across the country. September 15 is Independence Day, remembered the night before with children carrying lanterns and a torch passed across the region. Around mid-October, Limon on the Caribbean coast holds its carnival, with parades, drums and calypso music that give the port a very different feel from the Pacific side.
Nature seasons: whales and turtles
Humpback whales visit the southern Pacific coast twice, with one group in the early part of the year and another in the second half of the green season, and boat trips around the Marino Ballena area are the usual way to look for them. Sightings are a chance, not a promise, and a calm morning gives the best odds.
Sea turtles nest on both coasts. On the Pacific side, Ostional is known for mass arrivals in the rainier months, while on the Caribbean side Tortuguero sees green turtles come ashore in the middle of the year. These are guided, protected experiences by night, and the animals do not always appear, so go with a patient mood and a rain jacket.
Sources
- Open-Meteo / ECMWF ERA5, normals 1991-2020 computed for the grid cell at 9.9281N 84.0907W, checked October 8, 2026
- sunrise-sunset.org, sunrise and sunset calculated for the 15th of the month, 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
- 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
To plan your stay
- Things to Do in Costa Rica: Volcanoes, Beaches, Wildlife and Day Trips
- Where to Stay in Costa Rica: Beach Towns, Cloud Forest, Volcano Views and Which Base Fits Your Trip
- Costa Rica Airports: San Jose or Liberia? Beaches, Drive Times and Getting to Your Hotel
- Know Before You Go to Costa Rica: Entry Rules, Money, Getting Around and Local Customs