The central Pacific took the brunt of bad weather Thursday with up to 2.25 inches falling in six hours, said the national weather service. Major rivers were reported rising.
Affected areas included San Cristóbal, Savegre, Santo Domingo, Sábalo, El Silencio and La Gallega. In Dominical, the Río Barú was running out of its banks, said the Instituto Meteorological Nacional.
About 15 homes were reported to have been flooded in Hatillo de Quepos.
Some slides were reported on roadways in the central Pacific region.
Rain was predicted to last into the night.
There was less rain in the Central Valley where winds were reported.
The weather institute said that the winds in the Central Valley were due to a high pressure area over the Caribbean. Winds of up to 60 kph were reported, some 37 mph. Winds also were reported in Guanacaste.