Everyone plans their Costa Rica life around the dry season, and then spends more than half the year in the other one. So here is what the green season is actually like in Guanacaste, from someone who has stopped minding it.
The short version: it rains hard, usually in the afternoon, usually not for very long. The province goes from brown to spectacularly green in about two weeks. Prices drop, crowds vanish, the wildlife comes out, and a lot of long term residents quietly prefer it to the dry season.
The calendar
| Period | What happens |
|---|---|
| December to April | Dry season. Sun most days, little to no rain, landscape browns off. Peak season, peak prices. |
| May | The first rains arrive. Everything greens up almost immediately. Lovely month. |
| June | Regular afternoon rain, green landscape, quiet. |
| Mid July to early August | The veranillo, a short dry spell. Sun returns for a week or two. |
| August | Rain resumes, warm, green. |
| September and October | The wettest months. Heavier and more persistent rain, occasional all day systems. Quietest time of year. |
| November | Rain tapers, the province is at its greenest, high season has not started. Many residents’ favourite month. |
Guanacaste is the driest province in the country, and the national meteorological institute publishes the rainfall records that bear that out, so all of this is milder than the same months in the southern Pacific or the Caribbean. Green season here is not green season in Puerto Viejo.
What a green season day actually looks like
The classic pattern:
- Morning: bright, warm, often completely clear. This is when you do things.
- Midday to early afternoon: cloud builds. It gets close and humid.
- Late afternoon or evening: a proper downpour. Loud, heavy, sometimes with a thunderstorm worth watching.
- After: it clears, the air is washed clean and cool, and the frogs start.
You plan your day around the morning. That is the whole adjustment. Beach in the morning, errands early, and by 3pm you have an eye on the sky.
September and October break this pattern more often, with grey days and rain that settles in. That is the real rainy season, and it is about six weeks of the year.
The rain is not cold. This is not a grey drizzle you have to dress for, it is a warm tropical downpour that arrives, does its business loudly for an hour, and leaves. Sitting out a storm on a covered terrace with a beer is one of the genuinely great pleasures of living here, and it is impossible to explain to anyone whose mental model of rain is November in Ohio.
What gets better
The landscape. This is not a small thing. Guanacaste in April is brown, dusty and bare. Guanacaste in September is dense, saturated, tropical green. The transformation takes about two weeks in May and it is startling every year.
The wildlife. Everything comes out. Howler monkeys, more birds than you can identify, frogs at night, iguanas everywhere. The dry forest wakes up.
The prices. Rentals, tours, flights, restaurants. Green season rates across the board, often dramatically lower, which is why the tourism board markets these months hard.
The quiet. Beaches you have to yourself. Tables available. Roads without tour vans on them. If you found high season crowded, this is the antidote.
The temperature. It is cooler than April. Genuinely. The cloud and rain take the edge off, and after a downpour it is lovely.
The sunsets. Cloud makes sunsets. Dry season sunsets are nice. Green season sunsets are ridiculous.
What gets harder
The roads. This is the real one. Paved main roads are fine. Unpaved roads change character completely: ruts, washouts, river crossings that were dry two months ago. A 4x4 stops being a nice to have. See driving in Costa Rica.
Power and internet cuts. Storms knock things out. Usually briefly, occasionally not. If you work remotely, have a plan: a phone hotspot, a battery for the router, and a habit of saving your work.
Humidity and mould. Everything is damp. Leather, leave a bag in a closed cupboard for a month and find out. Residents run dehumidifiers or at least keep air moving. Do not store anything precious in a sealed dark space.
Mosquitoes. Worse in the wet months. Screens, repellent, and no standing water around the house. Worth factoring into what you pack.
Some places close. A few restaurants and businesses in the more tourist dependent towns shut for part of September and October. In a real year round town like Coco this is a handful of places, not the town. In heavily seasonal spots it is more noticeable.
Why this is the season to visit if you are thinking of moving
I say this constantly and people book in February anyway.
Anyone can love Guanacaste in January. Sun every day, everything open, everyone cheerful. It tells you almost nothing about whether you could live here.
Come in September or October instead. You will find out:
- whether the rain bothers you or delights you
- what is genuinely open year round, and who is genuinely around
- how the road to a house you are considering behaves when it is wet
- whether the town feels alive or abandoned out of season
- what the humidity does to your enthusiasm
Four days in the green season is worth two weeks in the dry season as research. It is also cheaper, which is a strange bonus for the more useful trip.
Ask people who have been here a few years which season they prefer and you get a surprising number saying green. The province is beautiful, the towns are calm, the heat is manageable and nobody is queueing for anything. The dry season is what you sell to visitors. The green season is often what residents actually enjoy.
Practical preparation
If you are moving, or spending a green season here for the first time:
- A vehicle with clearance, if you live anywhere off a paved road. This is worth factoring into where you rent or buy, and it is one of the things the Coco area page is useful for checking against.
- A dehumidifier, or at least fans and open cupboards.
- Surge protection for anything expensive plugged into a wall.
- A backup for internet, if your income depends on it.
- Quick dry everything. Cotton takes days.
- A decent rain jacket, used about six times a year, and never an umbrella in wind.
- Repellent, and screens that actually seal.
And then it ends
Some time in late November or December the rain stops, the skies clear, and the province begins its slow browning again. The first few weeks of dry season, with the landscape still green and the sun back, are arguably the best few weeks of the year.
Then it is January, everyone arrives, and the cycle starts over.
If you want the month by month version for the whole country rather than just this province, see the best time to visit Costa Rica. If you are weighing up whether Guanacaste is the right region at all, start here, and the honest guide to living in Coco covers what a year here is actually like. Still undecided? Book a call.
