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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Northern Focus Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
If you’re planning a trip to Guanacaste, expect a warm, mostly dry climate, especially from January through March. The live forecast above shows current conditions, but the region’s typical weather is reliably sunny with brief, passing showers during the green season.
What is the weather like in Guanacaste Costa Rica in January, February and March?
These months are the heart of the dry season, making them the most popular time to visit. Guanacaste Costa Rica weather in January and guanacaste costa rica weather in february both feature abundant sunshine, low humidity and daytime highs near 32–34°C, with cooler evenings. Guanacaste costa rica weather in march remains similarly dry, though temperatures can climb slightly as the dry season peaks. Trade winds help keep the heat comfortable along the coast.
When does the rainy season start in Guanacaste?
The wetter period typically begins in May and lasts through November, with the heaviest rain often in September and October. Mornings are still sunny, but afternoon downpours are common. Travel during the green season means fewer crowds and lush landscapes, though you’ll want a light rain jacket handy.
Is it always hot in Guanacaste Costa Rica?
Yes, temperatures stay warm year-round, typically between 28°C and 36°C. The main difference is rainfall, not heat. Even in the wet season, mornings are hot and sunny before afternoon storms arrive.
Does it rain a lot in Guanacaste in January?
Very little. January is part of the dry season, so you can expect clear skies and almost no rain. It’s one of the best months for beachgoers and outdoor activities along the Pacific coast.
What should I pack for Guanacaste weather?
Light, breathable clothing, swimwear, sunscreen and a hat are essential. In the dry season, a light sweater for evenings is useful. In the wet season, add a waterproof jacket and quick-dry footwear.
Sources
For more on Canadian travel weather, visit our Canada weather hub or compare conditions with Florida Weather.