Trade winds will remain moderately strong across northern and central Costa Rica, but they’re beginning to show signs of gradual weakening. That weakening will become more evident by early next week. This shift signals a potential transition from the recent dry period as the atmospheric patterns evolve.
At the same time, a slow (poco a poco) increase in humidity is building across the region, which could mean more rain in more parts of the country.
Today (Thursday) we experienced some isolated rainfall across regions in Costa Rica, but there’s a clear trend that precipitation will increase in the next seven days. Both the Caribbean and northern regions, as well as the Pacific and Central Valley, will see expanding rainfall chances.
The probability of rainfall increases significantly for the weekend, especially due to Tropical Wave #18 passing through on Saturday.
Here’s How the progression Could Play Out:
Thursday-Friday transition: The last days of strong dry influence, with isolated rainfall but still relatively dry conditions in traditional dry regions (Central Valley and North Pacific).
Saturday’s turning point: Tropical Wave #18 brings the most significant change to the weather pattern, with increased rainfall potential across all regions. This marks a clear interruption to the recent dry period.
Sunday onwards: As trade winds continue weakening and humidity increases, expect a more active rainfall pattern to establish itself across the country going into next week.
Partly cloudy conditions across the country provide generally pleasant starts to the day. The Caribbean coastal areas may experience rain that gradually spreads toward the Northern Zone. This pattern will become more pronounced as the next seven days progress.
The North Pacific and Central Valley will maintain partly cloudy conditions today and Friday, but expect rain and thunderstorms to begin developing Saturday as Tropical Wave #18 approaches.
The Central and South Pacific will see partly to completely cloudy conditions with rain, showers, and thunderstorms becoming more frequent. The Caribbean and Northern Zone will experience partly cloudy conditions with rain and showers concentrated mainly in mountain areas.
Cloudy conditions and possible rain will affect the Caribbean and Northern Zone. The Central Valley and North Pacific should expect partly cloudy conditions, though possible rain may occur during early weekend hours as weather patterns shift.
The Central and South Pacific will see scattered rain during the first part of the nights.
Central Valley & North Pacific: These areas have benefited most from recent dry conditions but will see the most dramatic change here as the pattern weakens. Saturday marks the beginning of more typical rainy season conditions returning.
Caribbean & Northern Zone: Already seeing more moisture lately, these regions will experience enhanced rainfall as atmospheric instability increases over the next seven days.
Central & South Pacific: Will continue their afternoon thunderstorm pattern but with increased intensity and coverage as humidity rises throughout the next seven days.
Temperature patterns remain comfortable, with refreshingly cool overnight conditions typical of the recent dry period.
Here’s what we are looking at for high and low temperatures across Costa Rica’s different regions:
High: 31° (87.8°) | Low: 15° (59°)
High: 34° (93.2°) | Low: 20° (68°)
High: 33° (91.4°) | Low: 15° (59°)
High: 33° (91.4°) | Low: 15° (59°)
High: 32° (89.6°) | Low: 20° (68°)
High: 34° (93.2°) | Low: 17° (62.6°)
This forecast is based on the weekly outlook shared by Costa Rica’s National Meteorological Institute (IMN).
