Costa Rica 7-Day Weather Forecast: May 26 to June 1, 2025

Recent Weather Events

Wow, this was quite something! Last Friday (May 23) a tornado touched down in Santa Ana (Central Valley area) First a powerful thunderstorm developed with cloud-top temperatures below -112°F (-80°C), generating strong downdrafts that enhanced the cloud’s counterclockwise rotation. The resulting funnel cloud touched down and lifted debris from the ground, creating the classic tornado appearance captured in local photos and videos.

This type of tornado forms differently than the big ones you see in the U.S. It’s what meteorologists call “non-mesocyclonic,” meaning it forms from local weather collisions rather than large rotating storm systems.

This Week’s Wet Weather Forecast

Costa Rica is heading into a distinctly humid and unstable week, setting up a classic rainy season pattern across the country. Several weather forces are combining to bring widespread precipitation: morning warming that builds afternoon clouds, refreshing sea breezes carrying moisture inland, the approach of Tropical Wave 3, and the ongoing influence of the Intertropical Convergence Zone.

Here’s what makes this week different: rain won’t just be an afternoon affair. The Caribbean and Northern Zone will wake up to cloud cover and showers right from the early morning hours, and this wet pattern may stick around through both mornings and nights. Meanwhile, the Pacific and Central Valley will continue their typical afternoon routine of rain, downpours, and thunderstorms, though these may linger longer into the evening than usual.

The big story this week is Tropical Wave #3, expected to arrive on Wednesday. This could significantly boost rainfall activity across the entire country, so plan accordingly for the second half of the week.

Daily Weather Breakdown

Mornings

Expect partly cloudy to cloudy skies nationwide. The Caribbean and Northern Zone will start the day with showers, while Pacific coastal areas might also catch some morning rainfall – not the usual clear morning start we’re used to in these regions.

Afternoons

This is when the main weather action unfolds. The Pacific, Central Valley, and Northern Zone should prepare for clouds building into showers with thunderstorms. Rainfall will become heavier as we move into the second half of the week, especially after Tropical Wave 3 arrives. The Caribbean stays relatively calmer with partly cloudy conditions, though mountain areas could see some showers.

Evenings

The Pacific, particularly coastal areas, will remain cloudy with ongoing showers. The Central Valley can expect scattered showers during the early evening hours. Both the Northern Zone and Caribbean will range from partly cloudy to overcast with isolated showers possible.

Temperature Check Across the Country

Despite the increased rainfall, temperatures remain warm during the day, with the North Pacific still leading the heat index. The Central Valley continues to offer those refreshing overnight temperatures perfect for comfortable sleeping.