The short version: Guanacaste is a year-round destination — December to April guarantees sun, May to November trades a daily afternoon shower for green landscapes, lower prices and thinner crowds. It's the driest region in Costa Rica, which is why the Gold Coast rarely has a truly "bad" month.
The two seasons, honestly
Dry season (December–April). Zero-umbrella weather: cloudless skies, 30–35 °C afternoons, golden-brown hills. This is peak season — book hotels and airport transfers well ahead, especially Christmas, New Year and Easter week.
Green season (May–November). The landscape flips to jungle-green. The typical day: sunny morning, clouds building after lunch, a 1–2 hour downpour around 3–5 pm, clearing for sunset. Prices drop 20–40%, beaches empty out, and everything smells alive. September–October are the wettest months; they're also when locals take their own beach trips.
Month by month
| Month | Rain | Heat | Crowds & prices | The inside scoop |
|---|---|---|---|---|
| December | Almost none | Hot, breezy | High → peak at Christmas | Papagayo winds start; landscape still green from rains |
| January | None | Hot, breezy | Peak | Postcard weather; book everything early |
| February | None | Hot | High | Driest month; leatherback turtles at Playa Grande |
| March | None | Hottest | High (Spring Break) | Hills turn gold; heat peaks mid-afternoon |
| April | Rare first showers | Hottest | Peak at Easter, then dropping | Semana Santa is the busiest local week of the year |
| May | Afternoon showers begin | Hot, humid | Low | Green returns overnight; great deals |
| June | Moderate afternoon rain | Warm | Low–medium | Lush and quiet; US summer travelers arrive late June |
| July | Brief mid-season dry spell | Warm | Medium (veranillo) | The little summer — sunny weeks, green scenery |
| August | Moderate | Warm | Medium, then low | Ostional arribadas ramp up; surf pumping |
| September | Heaviest | Warm | Lowest | Biggest hotel discounts; plan mornings, siesta the rain |
| October | Heaviest | Warm | Lowest | Some businesses take holidays; waterfalls at full power |
| November | Tapering fast | Warm | Low → rising | Sweet spot: green hills, dry days, pre-peak prices |
Best month by traveler type
- Guaranteed beach sun: January–March.
- Best value without daily rain: November or early December — green landscapes, dry-season weather, shoulder prices.
- Surfers: May–November for size; December–April for clean beginner waves.
- Turtle lovers: August–December for Ostional's arribadas (thousands of olive ridleys over a few nights); October–March for leatherbacks at Playa Grande.
- Honeymooners on a budget: September — yes, it rains, but you'll have entire beaches and top restaurants nearly to yourselves.
One planning tip the weather charts miss
Rain changes roads more than plans. Paved routes (Tamarindo, Flamingo, Coco, Papagayo) are unaffected year-round, but the dirt stretches into Nosara or Monteverde get slow and muddy September–October. If you're traveling deep green season, that's the strongest argument for letting a local driver handle the last hour — our vans do those roads every day of the year.
Frequently asked questions
What is the driest time of year in Guanacaste?
December through April is the dry season: nearly zero rain, hot sunny days and the busiest tourism months. Guanacaste is the driest region of Costa Rica, so even the rainy season here is milder than in the rest of the country.
Is Guanacaste worth visiting in the rainy season?
Absolutely. May through November (locals call it green season) brings green landscapes, lower prices, fewer crowds and rain that typically falls as an afternoon shower, leaving mornings sunny. September and October are the rainiest months on the Pacific.
When can I see turtles nesting in Guanacaste?
Olive ridley turtles nest at Ostional (near Nosara) most of the year, with massive arribadas peaking August through December, usually around the last quarter moon. Leatherbacks nest at Playa Grande roughly October through March.
When is the best surf in Tamarindo?
There are waves all year. The biggest, most consistent swells hit May through November; December through April brings smaller, cleaner waves ideal for beginners. Mornings are typically glassy year-round.
How hot does Guanacaste get?
Expect 30-35C (86-95F) most afternoons year-round, with March and April the hottest and driest. The December-February trade winds (papagayo winds) make evenings pleasantly breezy.
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