Guanacaste is one of several regions in Costa Rica, with temperatures that range from 29°C (84°F) in October to 33°C (91°F) during the peak of April. We've based our full climate overview on data from Tamarindo, the region's most prominent city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.
In Guanacaste, particularly in Tamarindo, temperatures are consistently high throughout the year, with average maximum temperatures always above 29°C (84°F).
February, March and April are generally the hottest months of the year.
When it comes to rainfall, Guanacaste sees significant variations throughout the year. October tends to be the wettest, receiving 354 mm (14 in) of rain, while February is much drier with just 3 mm (0.1 in). Travelers should note that the rainy season falls during May, June, August, September and October, bringing substantial precipitation ranging from 241 mm (9.5 in) to 354 mm (14 in) monthly. For those seeking drier weather, January, February, March and December typically see minimal rainfall, never exceeding 14 mm (0.6 in).
For those seeking sunshine, March usually has the brightest skies, making it an excellent time for exploring the region.
