Guanacaste Costa Rica Weather

Q: Does it rain a lot in Guanacaste during January?

January is the driest month; average rainfall is less than 10 mm. You can expect 8–10 hours of sunshine daily and almost no afternoon storms. The live forecast above will confirm if any brief showers are possible.

Q: Is the water warm enough for swimming in February?

Yes – Pacific Ocean temperatures in Guanacaste hover around 27–28 °C in February. Combined with calm seas, it’s ideal for swimming, snorkelling and surfing. The live forecast above shows wind conditions that may affect wave height.

Q: How windy is Guanacaste in March?

Trade winds pick up slightly in March, with average gusts of 25–35 km/h, especially near Papagayo Peninsula. The breeze keeps the heat comfortable and is welcomed by windsurfers. Check the live forecast above for daily wind speeds.

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By Jessica Morin, Provincial Affairs EditorReviewed by Andrew LeblancForecast data: Open-Meteo & Environment and Climate Change Canada

Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Toronto Post Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.

Expect daytime temperatures in the 30–34 °C range and a low chance of rain across Guanacaste’s Pacific coast; the live forecast above shows the latest conditions, so check it before planning beach or outdoor activities.

What is the typical dry-season pattern?

Guanacaste’s dry season runs from November through April, with January, February and March each bringing less than 25 mm of rainfall on average. Daytime highs stay near 33–34 °C, while overnight lows drop to 22–24 °C. The region is sun-drenched, though a brief afternoon cloud build-up is common.

How do January, February and March compare?

January and February are the driest months of the year, often recording zero measurable rain for weeks at a time. March sees a slight uptick in humidity but remains firmly dry, with occasional light showers mainly near the coastline. Guanacaste Costa Rica weather in January, Guanacaste Costa Rica weather in February, and Guanacaste Costa Rica weather in March all deliver reliable sunshine and warm seas, making them peak tourist months.

Average high33–34 °C (dry season)

Dry seasonNovember–April

Rainfall (Jan–Mar)<25 mm per month

Water temperature27–28 °C year-round

Does it rain a lot in Guanacaste during January?

January is the driest month; average rainfall is less than 10 mm. You can expect 8–10 hours of sunshine daily and almost no afternoon storms. The live forecast above will confirm if any brief showers are possible.

Is the water warm enough for swimming in February?

Yes – Pacific Ocean temperatures in Guanacaste hover around 27–28 °C in February. Combined with calm seas, it’s ideal for swimming, snorkelling and surfing. The live forecast above shows wind conditions that may affect wave height.

How windy is Guanacaste in March?

Trade winds pick up slightly in March, with average gusts of 25–35 km/h, especially near Papagayo Peninsula. The breeze keeps the heat comfortable and is welcomed by windsurfers. Check the live forecast above for daily wind speeds.