Photo: Gustavo Esquivel via Google
When to Go to Guanacaste
Reading the calendar for dry sun, warm water and the right kind of quiet.
The verdict
- Best forTravellers weighing dry sunny weather against crowds, prices and the green season rains.
- Top pickLate November through April for the driest skies, with November and early December the smartest value.
- One thing to knowGuanacaste has two clear seasons, a long dry summer and a green rainy half, and the coast is breezy in the early dry months.
Published 15 February 2026. Last reviewed 5 March 2026
Guanacaste keeps its own calendar, drier and more strongly seasonal than the rest of Costa Rica, and that makes the timing of a trip matter more than almost anywhere else in the country. The province swings between a long dry summer the locals call verano and a green rainy half they call invierno, and the beach you picture, gold sand under a hard blue sky, belongs firmly to the dry months.
The dry season runs roughly from December to April. Rain all but disappears, the hills turn the colour of straw, and the sun is reliable from breakfast to the long golden hour that makes the Pacific coast so loved. The trade is heat, dust on the back roads, a stiff offshore wind through December to February, and the highest prices and crowds of the year, sharpest around Christmas, New Year and Easter week.
The green season, from May to November, flips the picture. Mornings are often bright and the afternoons bring warm downpours that clear as fast as they arrive, the landscape turns a startling green, the rivers and waterfalls fill, and the prices and crowds drop away. September and October are the wettest, quietest and cheapest, while a curious dry spell known as the veranillo often brightens July.
The sea stays warm enough to swim in every month, so the real question is what you want from the days around it. Below is a month by month read, then notes on the months that most reward a visit. Treat all of it as the typical pattern rather than a promise, because the rains and the wind shift from year to year.
Month by month at a glance
| Month | Air | Sea | Rain | Crowd | Verdict |
|---|---|---|---|---|---|
| January | Warm | Warm | Low | High | Dry and bright with a steady coastal wind, peak season |
| February | Warm | Warm | Low | High | Reliably sunny and breezy, the heart of high season |
| March | Hot | Warm | Low | High | Hot, dusty and the driest stretch of the year |
| April | Hot | Warm | Low | Medium | Hot before the first rains, crowds beginning to thin |
| May | Hot | Warm | Medium | Medium | First green rains arrive in the afternoons, prices ease |
| June | Warm | Warm | Medium | Low | Green and quiet with short afternoon showers |
| July | Warm | Warm | Medium | Medium | The veranillo dry spell often brightens midsummer |
| August | Warm | Warm | Medium | Medium | Warm sea and green hills with gentle crowds |
| September | Warm | Warm | High | Low | Wettest month, deeply green, cheapest and quietest |
| October | Warm | Warm | High | Low | Heavy rains linger but the value is superb |
| November | Warm | Warm | Medium | Medium | Rains fade fast, a lovely green to dry value window |
| December | Warm | Warm | Low | High | Dry season returns with wind and holiday crowds |
When each month earns its place
March. March is the driest and hottest month, the surest bet if all you want is sun on sand and a swim. The catch is the landscape, which by now is brown and dusty, and the heat, which asks for an early start and a long lunch in the shade. Order a cold ceviche and a casado at a beachfront soda, wait out the midday glare, and return to the water for the afternoon.
July. July often brings the veranillo, a little summer dry spell that interrupts the green season with a run of brighter days. It is one of the smartest windows of the year, with green hills, a warm sea, manageable crowds and prices well below the December peak. Mornings are usually clear, so plan beach time early and leave the steamy afternoons for a market wander or a long table of grilled fish.
September and October. These are the wettest, quietest and cheapest months, and for a traveller who does not mind a daily downpour they can be wonderful. The countryside is at its most lush, the waterfalls run hard, and the beaches feel almost private. Leatherback turtles also begin their nesting season at Playa Grande in October, watched on guided night tours. Bring a relaxed plan and travel insurance, and the value is hard to beat.
November. November is the sweet spot many regulars quietly guard. The rains taper through the month, the land is still green from the wet season, the crowds have not yet arrived, and the prices remain gentle before the December climb. You get much of the look of the green season with much of the reliability of the dry, which is a rare and lovely combination on this coast.
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Before you go
What is the best time to visit Guanacaste?
For dependable sun, late November through April is the easy answer, with the driest skies and the best beach weather. If you want the same reliability with fewer crowds and lower prices, late November and early December are the smartest weeks before the holiday rush.
When is the green or rainy season in Guanacaste?
The green season runs from about May to November, with the heaviest rain in September and October. The rain usually falls in warm afternoon bursts rather than all day, the landscape turns vivid green, and prices and crowds are at their lowest of the year.
Is the sea warm enough to swim all year in Guanacaste?
Yes. The Pacific here stays warm and swimmable every month of the year, a little warmer in the green season and barely cooler in the dry. The deciding factors are the wind, the surf and the crowds rather than the water temperature, and conditions are typical and never guaranteed.
Is Guanacaste windy?
It can be. From December to February a strong offshore wind blows off the inland plains, especially in the afternoons, which keeps things cooler but can whip up sand and chop on exposed beaches. Sheltered bays such as Playa Hermosa and Playa Conchal feel the wind far less than the open stretches.
When can you see turtles nesting at Playa Grande?
Leatherback turtles nest at Playa Grande, inside Las Baulas National Marine Park, mainly from October to February. Visits happen on guided night tours only, with strict rules to protect the turtles, so book through an authorised guide and never use lights of your own.
When is the cheapest time to visit Guanacaste?
September and October are the cheapest and quietest months, falling at the peak of the green season rains. With a flexible plan the value is excellent, though you should expect daily afternoon showers and accept that an occasional washed out day is part of the bargain.