Costa Rica rainy season: is the green season worth it?

Rain at two in the afternoon, and USD 240 a night off the same room

On the Pacific coast in September the morning is yours and the afternoon belongs to the sky. Rain through the green season falls heaviest after lunch, and September and October are the wettest weeks of it. ⁴ So the park gate early, the boat mid-morning, lunch in Quepos, and somewhere dry by two. A Standard Room at Tulemar, which takes two guests and sleeps four, costs USD 345 a night. In Easter week the same room costs USD 585. ³

That trade is the whole question. This page answers it with the dates Costa Rica's national weather service publishes, one resort's live rate table, the nesting calendar of Tortuguero's turtles, and the rainfall record of two cities on opposite sides of the mountains.

One thing to fix before anything else: there is no single Costa Rican season. The Pacific side has a dated wet season and a dated dry one. The Central Valley swings harder than either coast. The Caribbean stays wet all year and peaks in December, the month the Pacific finishes drying out. ^{2, 5, 6}

When is Costa Rica's rainy season?

The Instituto Meteorológico Nacional dates the season from daily rainfall covering 1991 to 2020, using an 80mm-a-month threshold held for at least three months in a row.

The weather service publishes a start and an end for five rainfall regions, and the five differ by weeks. ² The Central Valley around San José turns wet between 29 April and 8 May. The Pacífico Central region, which covers Quepos, Manuel Antonio and Jacó, follows between 2 and 10 May. The northern lowlands around Arenal wait until 11 to 13 May. ²

The far end spreads wider. San José dries out between 8 and 23 November, the Pacífico Central coast between 6 and 23 November, and the northern lowlands hold their rain until 3 to 7 December. ² Book a La Fortuna leg for late November and you are still inside the wet season there while the coast four hours away has left it.

Month by month across the four stops

Read the weather-service dates literally and the year takes three shapes, one per side of the mountains and one for the valley in between. The table below turns those dates into months for the four stops a fortnight usually strings together, with Limón standing in for the Caribbean coast. ^{2, 5}

• Late April is the last of the cheap dry weather. The Central Valley turns between 29 April and 8 May and the Pacific coast between 2 and 10 May, so the opening days of May often still read as dry on the coast. ²
• 16 November to 19 December is the overlap worth hunting. Pacific rain ends by 23 November, and Tulemar's rate in that window is USD 385, against USD 570 from 20 December. ^{2, 3}
• Early December belongs to Arenal's rain and Limón's peak. The northern lowlands stay wet to 3 or 7 December, and December is the wettest month Limón gets. ^{2, 5} The Arenal leg sits at the edge of Guatuso, Maleku territory between the volcano and the Nicaraguan border. ⁸
• A September fortnight wants a Caribbean weighting. That month is the Pacific's wettest and Limón's driest, and it sits inside Tortuguero's nesting season. ^{4, 5, 7}

What do green season discounts actually save?

One Manuel Antonio resort publishes a full seasonal rate table. It is the clearest price signal on this coast, and the arithmetic below runs entirely on it.

Tulemar Resort prices its rooms in six dated windows, and the gap between the cheapest and the dearest is the green season's whole argument. A Standard Room costs USD 345 a night from 1 May to 15 November 2026. The same room costs USD 570 from 20 December to 2 January and USD 585 from 20 March to 3 April 2027. ³

In percentages: the holiday window runs 65.2% above the green-season rate and Easter week 69.6% above it. Same Standard Room, same two-guest rate, same four-person capacity. ³

Bigger units swing harder still. Casa de las Flores, which sleeps up to five, starts at USD 750 a night in green season and reaches USD 1,490 in Easter week. That is 98.7% more, so the peak rate is very close to double. ³

Tulemar publishes; most of its neighbors send you to a booking widget. Arenal Observatory Lodge, Si Como No and Hotel Belmar in Monteverde all describe their rooms in detail and then ask for your dates before showing a price. Write to each with two date ranges, one in green season and one in March, and compare the two quotes side by side. MMT's Costa Rica trip cost page prices the rest of the fortnight.

Which coast should you be on in September?

September is the wettest stretch of the Pacific year and the driest month Limón gets. ^{4, 5} Once you know that, a green-season fortnight stops being a gamble and becomes a routing decision.

Limón has no consistently dry season. Its driest month, September, averages about 140mm of rain, its wettest, December, about 450mm, and the year comes to nearly 3,600mm. ⁵ San José swings far harder: 6.3mm in its driest month against 355.1mm in its wettest, a 56-fold gap, while average temperatures there barely move across the year. ⁶

Green season is also turtle season. The Sea Turtle Conservancy, which runs the long-running tagging program at Tortuguero, dates green turtle nesting from June through November each year and schedules its own volunteer research seasons June through October. ⁷ The months the rest of the country marks down are the months the beach fills up with turtles.

So a September fortnight has an obvious shape. Weight the beach days toward the Caribbean and keep the forest days inland. The southern Caribbean coast is Talamanca, Bribri and Cabécar territory, where the residents' own ecotourism association, ATEC, books guides and tours. ^{9, 10} MMT's two-week Costa Rica itinerary runs the Pacific version of that route.

Monteverde keeps its cloud all year

The Preserve sits on the Continental Divide, where rain landing on one side runs to the Pacific and on the other to the Caribbean. Average temperatures hold between 14C and 22C, and the Preserve's own site calls that a gentle equilibrium that a two-degree change can collapse. ¹

Mist does the work the rain gets credit for. Up to 40% of the water this forest captures arrives as horizontal rain, on days with no rainfall at all, and the forest takes in up to 3,000mm of water a year. ¹

March feels much like September up there. Pack for cool and damp either way; the one-bag tropics packing list has the layers.

That makes Monteverde the strongest green-season stop on any Costa Rican route. The thing you came to see is a cloud, and the cloud keeps its own hours.

Hurricane season, stated plainly

Both basins around Costa Rica run an official hurricane season through most of the green season. An average Atlantic season over the 1991 to 2020 period brings 14 named storms, 7 hurricanes and 3 major hurricanes, with the first named storm usually forming in mid to late June. ¹²

Those weeks line up almost exactly with the Pacific coast's own rainy season and with the moisture that lifts Limón's totals. ^{2, 5} The practical version for a traveler: read the forecast in the week before you fly, and put the long drives early in the day. Then ask what a cancellation actually costs, because the answer is rarely nothing.

The Maleku in Guatuso, the Bribri and Cabécar in Talamanca

The Arenal leg sits at the edge of Guatuso, where the Maleku hold their territory and run their own affairs. About six hundred Maleku lived in the three palenques, Tonjibe, Margarita and El Sol, in rainforest between the volcano and the Nicaraguan border, when Cultural Survival counted them in 2013. ⁸

They farm, paint wooden masks and jícara gourd bowls, replant forest and host visitors at the palenques, and the Association for the Development of the Indigenous Maleku Territory is their own organization. ⁸

Land is the live question, and the Maleku are the ones pressing it. Cultural Survival reported that on 10 December 2012 community members entered a privately held estate inside the Guatuso Reserve, asserting their claim under Article 3 of Costa Rica's 1977 Indigenous law. Maleku families hold about fifteen percent of the territory the state recognised as theirs. ⁸

That account is more than a decade old. Ask the Association where the claim stands now before repeating it.

On the Caribbean side, Talamanca's visitor economy belongs to the people who built it. The Bribri and the Cabécar are two Nations with their own languages and their own territories across Talamanca. The Cabécar are the larger, near 17,000 people at the 2011 census, and speak a Chibchan-family language. ⁹

ATEC, the Talamanqueña Association of Ecotourism and Conservation, was formed by Talamanca residents in 1990 and has 80 members in the canton. Its first training program prepared sixteen community members as nature guides for the region, and it states that 70% of the price of every tour booked through it reaches the local guides or the projects visitors see. ¹⁰

Ask any operator what share of the price reaches the community and the guide. ATEC publishes 70%. Use that as the number to compare against.

How do you plan a green season fortnight?

Five decisions carry the whole plan, and four of them happen before you pay anyone. Dates first, quotes second. The daily rhythm decides how much of the rain you actually meet.

1. 01

   Pick the coast by month

   June to October points at the Caribbean and the cloud forest. Late November and early December point at the Pacific, after its rain ends by 23 November and before the 20 December price step. ^{2, 3}

2. 02

   Ask every hotel for two dated quotes

   Request one green-season range and one March range in the same email. Tulemar shows the shape of the answer: USD 345 against USD 585 for one Standard Room. A property that quotes only one range has told you something too. ³

3. 03

   Count the tax before you compare

   Costa Rican resort billing adds real money. Tulemar's 13% VAT and 4.5% fee turn USD 345 into USD 405.38 a night and USD 585 into USD 687.38. Compare the billed numbers. ³

4. 04

   Build the day around the morning

   Green-season rain on the Pacific lands heaviest in the afternoon. Park gates and boat trips go before lunch. Hot springs and a long lunch go after. ⁴

5. 05

   Read the deposit terms before you pick dates

   Tulemar's seven-night minimum applies to Christmas and New Year only, so it does not bind green-season dates. The deposit does not soften with the season. Tulemar takes 50% non-refundable at booking in every window, and states that cancellations for weather disruptions, flight cancellations or force majeure are not exempt. ³

For a longer stay, the season stops mattering and the paperwork starts. MMT's Costa Rica digital nomad requirements covers the income evidence and insurance, and the rest of the country sits in Costa Rica guides and field notes.