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Published on Wednesday, May 27, 2026
By the A.M. Costa Rica staff
Costa Rica is expected to see increased rainfall this week as the fifth tropical wave of the rainy season moves across the country, the National Meteorological Institute (IMN) announced.
Costa Rica has a
tropical and subtropical climate with
two primary seasons. The
dry season, commonly referred to as
summer, typically runs from December
through May, while the rainy season
extends from June through November and
generally coincides with the Atlantic
hurricane season.
Although the tropical wave is expected to pass within 24 hours, lingering moisture could continue to generate showers through Friday, with weather conditions gradually improving by Saturday. Meteorologists said the Intertropical Convergence Zone, a low-pressure belt near the equator that fuels storm activity, is also expected to intensify rainfall as it shifts over Costa Rica from the Pacific Ocean toward the Caribbean Sea.
The IMN forecast
the following rainfall totals across the
country:
The
National Emergency Commission (CNE) holds
a Green Alert, the agency’s first
level of warning for the Caribbean Coast
(Limón Province).
Under
a Green Alert, local emergency committees
are instructed to closely monitor
conditions due to an elevated risk of
flooding or other weather-related
emergencies.
No
alert has been issued for the rest of the
country.
The
Ministry of Public Works and
Transportation (MOPT) issued a
precautionary advisory for Route
32,
the main highway connecting San José and
Limón. Authorities said overnight closures
are possible because of heavy rain and the
risk of landslides.
Drivers were advised to use alternate routes, including Route 10 through Turrialba canton (Cartago) and onward to Siquirres canton (Heredia), before reconnecting with Route 32 toward Limón. MOPT said it will post traffic updates through its official social media channels.
Authorities
urged residents to take several
precautions during the storm, including:
The
IMN is Costa Rica’s government agency
responsible for issuing weather forecasts,
hazardous weather warnings and related
public safety information.
CNE
works in partnership with communities and
emergency responders to strengthen the
nation’s preparedness, response, and
recovery from natural hazards.
MOPT
is the government agency responsible for
managing the country’s roads, ports, and
airports, as well as overseeing public
transportation policy.
A.M. Costa Rica
encouraged readers to share the weather
advisory with family members, friends and neighbors.
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