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Published on Tuesday, May 19, 2026
By the A.M. Costa Rica staff
Costa Rica is preparing for its third tropical wave of the season, which is expected to move across the country this week and bring widespread rainfall, according to the National Meteorological Institute (IMN).  The weather system was moving along Panama’s Caribbean coast on Tuesday and is forecast to reach Costa Rica by Wednesday, bringing heavy rain and thunderstorms across much of the country.
Although
the disturbance is expected to pass within
24 hours, the IMN said lingering moisture
could continue generating showers through
Thursday, with conditions gradually
improving by Friday.
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 to the Caribbean.
Costa Rica has a tropical and subtropical climate with two primary seasons. The dry season, commonly known as summer, typically runs from December through May, while the rainy season extends from June through November, closely aligning with the Atlantic hurricane season.
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
are advised to take alternate routes,
including Route
10 through Turrialba canton
(Cartago) and onward to Siquirres
canton
(Heredia), before rejoining Route 32
toward Limón. MOPT will post traffic
updates on its official
social media channels.
The
IMN forecast the following rainfall totals
across Costa Rica:
Authorities
urged residents to take precautions during
the storm, including avoiding rivers and
lakes during periods of heavy rain,
monitoring mountain areas for landslides
and falling debris, and reviewing
evacuation plans in flood-prone
communities.
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