In this blog, we cover everything you need to know about the sun, rain, and the mysterious veranillo (little summer) that the locals whisper about, plus some numbers to show you how the temperatures and precipitation fluctuates throughout the year.
Compared to where you're from, you will find the weather in Playa Potrero, refreshingly low-maintenance. There are two settings: Dry and Green and it's either hot or very pleasant during both so there is never a need to debate about when it's socially acceptable to wear shorts. Just sun, and sun with a side of rain.
Still, "two seasons" undersells how much personality this little stretch of Guanacaste coastline packs into a year. So we pulled the actual numbers and will walk you through the whole delightfully uncomplicated calendar — including what to do with yourself when the sky opens up and out comes una tormenta (storm).
Before you Google it: weather apps love Playa Flamingo and mostly ignore Playa Potrero, even though Flamingo is about 5 km up the road and shares essentially identical weather. So when you're checking the forecast, search "Playa Flamingo, Costa Rica" — not Potrero — and you'll actually get a hit.
Meet your two seasons
☀️ Dry Season — December to April
Wall-to-wall sunshine, dust on the dirt roads, and skies so blue they look Photoshopped. This is high season: prices climb, snowbirds flock in from colder latitudes, and restaurants fill up. By the peak of dry season (think March, April) the sun and heat get genuinely intense — this is not gentle, filtered, springtime sun. It is Guanacaste sun, and it means business.
🌱 Green Season — May to November
The jungle exhales, the hills flip from brown to an almost aggressive green, and the pattern settles into something you can set your watch by: hot, sunny mornings, then clouds roll in and the afternoon brings a shower — sometimes a quick rinse to cool things off, sometimes a full theatrical downpour with thunder for dramatic effect. Evenings usually clear back up.
Between the two, there's a hinge point worth knowing about: by May, the heat starts to break, clouds move in more often, and the rains gradually spin up. It doesn't flip like a light switch — it eases in, which is exactly the kind of unhurried behavior you'd expect from a place that also invented "Tico time."
The fine print: Costa Rica is a small country with big opinions about climate
For a country you could drive across in a few hours, Costa Rica's microclimates are wildly varied. As a general rule, the coasts run warmer and the highlands run cooler — obvious enough. Less obvious: humidity climbs as you head south, and the Caribbean side plays by entirely different rules, staying rainy more or less year-round regardless of what the Pacific side is doing. Everything in this post is specifically about Potrero and the surrounding Gold Coast of Guanacaste — not "Costa Rica" as a monolith. Someone in Monteverde reading this and packing accordingly would have a bad time.
The numbers: rainfall and temperature by month
Averages for the Potrero / Playa Flamingo & Playas del Coco stretch of coastal Guanacaste.
| Month | Rainfall | Avg. High | Avg. Low | Note |
|---|---|---|---|---|
| January | 3 mm | 30.3°C | 23.7°C | |
| February | 2 mm | 31.2°C | 23.8°C | |
| March | 3 mm | 32.1°C | 24.1°C | |
| April | 20 mm | 32.4°C | 24.9°C | Hottest |
| May | 198 mm | 30.5°C | 24.9°C | |
| June | 211 mm | 29.0°C | 24.4°C | |
| July | 132 mm | 29.4°C | 24.3°C | Veranillo dip |
| August | 168 mm | 29.4°C | 24.3°C | Veranillo dip |
| September | 263 mm | 28.4°C | 23.9°C | |
| October | 321 mm | 27.8°C | 23.7°C | Wettest |
| November | 90 mm | 28.4°C | 23.6°C | |
| December | 10 mm | 29.4°C | 23.7°C |
Source: climate-data.org and weather-and-climate.com, long-term averages for El Coco / Playa Flamingo, Guanacaste.
A couple of things to take note of:
- The temperature line barely moves - only a 4–5°C swing across the entire year on the high end, and even less on the low end — this is the tropics.
- Rainfall is where all the actual "seasonality" lives. From December through April the rain gauge is basically decorative — February averages a laughable 2 mm for the entire month. Then May hits, the spigot turns on, and by October — the wettest month of the year — Potrero is getting over 300 mm of rain, more than the previous five months combined.
And look closely at July and August: rainfall actually dips before climbing again into September and October's peak. That dip has a name, and it deserves its own section.
Veranillo: the locals' best-kept secret
Smack in the middle of green season, Guanacaste gets a little meteorological plot twist: a stretch of unusually sunny, drier weather in July and August that locals call Veranillo — literally, "little summer." The rain doesn't vanish entirely, but it eases up noticeably, the skies clear, and you get some of the best light of the entire year, green hills and blue water at the same time.
Veranillo is our favorite time of year to be in Playa Potrero and almost nobody outside Costa Rica has heard of it.
It's the kind of thing you only know if you live here (or read blogs written by people like us who do). Tourists tend to write off "rainy season" wholesale and miss this window entirely, which, selfishly, is fine by us.
Is rainy season actually bad? No!!
Here's the thing about "green season" — the marketing team clearly got involved at some point, because "rainy season" sounds like a slog and "green season" sounds like a spa day, and, honestly, they're both kind of right. The rain here isn't the gray, all-day, will-this-ever-stop rain you might be picturing. It's tropical rain: dramatic, occasionally theatrical, sometimes genuinely wild with thunder rolling in off the ocean — and then it clears, and the light that follows is glorious. Steam rises off the pavement, everything smells like wet jungle and cut grass, and the sunset that evening is usually showing off.
We like every season here for different reasons, and we'd gently push back on anyone who rules out a green-season trip, especially the "shoulder" months at the edges of it (think May, June, or November) when the landscape is lush, the crowds are thinner, the prices are friendlier, and you still get plenty of sun. Our honest philosophy: there's no such thing as bad weather, just inappropriate clothing. Pack a light rain jacket, don't panic when the sky goes dark at 2pm, and you'll be fine.
What to do when it's pouring outside
Green season showers in Potrero tend to be efficient — heavy, then gone — but if you find yourself stuck under a genuinely committed downpour, here's how the locals (and smart visitors) pass the time:
- Watch the show. Grab a coffee (or something stronger), post up under a covered porch or palapa, and just watch. A proper Guanacaste thunderstorm rolling in off the Pacific is genuinely great entertainment, and it's free.
- Book the spa treatment you keep saying you don't have time for. A rainy afternoon is exactly what massages were invented for. Most area resorts and wellness spots welcome walk-ins even if you're not staying there.
- Take a Spanish class or a cooking class. Several local spots offer casual lessons — learn to make ceviche or ceviche's rowdier cousin, and pick up enough Spanish to order the next round properly.
- Drive (or duck) into Tamarindo, Playas del Coco, or Liberia. More shops, more restaurants, an actual movie theater and shopping center in Liberia if you want full climate-controlled indoor plans.
- Board games and a bottle of wine. Unreasonably effective. Nobody has ever regretted an afternoon of cards with the rain going outside.
- Go looking for wildlife anyway. Counterintuitive but true: rain gets frogs, birds, and howler monkeys more active, not less. Bring a rain jacket, not an umbrella (the wind laughs at umbrellas), and go for a walk.
- Chase a waterfall. Guanacaste's waterfalls go from "trickle" to "genuinely impressive" once the rains arrive — green season is actually the best time to see them at full volume.
- Let the kids have a rain bath. Warm tropical rain, a bathing suit, and zero adult dignity required. This is, unscientifically, one of the most popular rainy-day activities in Potrero among the under-12 crowd.
- Read on the patio and do absolutely nothing. This is, ultimately, the correct answer more often than not.
The sun keeps surprisingly regular hours
If you're used to summer evenings that stretch to 9pm and winter afternoons that go dark at 4:30, Potrero's sun is going to feel almost suspiciously reliable. Sitting at roughly 10.4°N latitude — close to the equator — the length of the day barely changes here across the entire year. Sunrise drifts by about 40 mins (5:20a in May to 6:05 in January) sunset by about 45 minutes (5:16p in November to 6:09p in July).
The sunsets in Potrero, and especially at Playa Grande can be spectacular but they also happen quickly. There's very little twilight lingering near the equator, so when the sun decides to go down, it means it. Ask anyone who's been caught on the beach at "just one more photo" and watched full darkness arrive in about fifteen minutes.
So, when should you visit Playa Potrero?
There isn't a bad time to come just better, depending on what you're looking for. If you want guaranteed sun, higher prices, and more company on the beach come December through April. If you want lower prices, a green landscape, dramatic afternoon storms, and don't mind the occasional rain jacket then Green season is calling, especially the shoulder months. If you want to find out about the local secret book July or August. Just bring the rain jacket regardless — not because you'll necessarily need it, but because the day you don't bring it is, reliably, the day you will.
If you have any questions about what a particular season actually feels like on the ground in Playa Potrero — or want local advice on timing a visit? Get in touch, we're happy to talk weather (and pretty much everything else about this stretch of coast) any time of year.
Then once you decide, Book Direct with us and save on platform fees.