Variable atmospheric conditions characterize this week as Costa Rica transitions from unsettled early-week weather to stable dry season patterns. The combination of high atmospheric humidity, moderate trade winds in mountainous areas, and local effects like sea breezes will favor afternoon cloud formation and showers Tuesday and Wednesday, particularly in the Central and South Pacific. The Central Valley and Nicoya Peninsula may also see isolated afternoon showers during these first days.
Starting Thursday, conditions shift significantly as trade winds increase and humidity decreases, creating mostly stable weather with little rainfall across most of the country. The Caribbean and Northern Zone may experience cloudiness and light rain during early morning and evening hours, but overall, the week’s second half marks a return to classic dry season patterns.
High atmospheric humidity combined with moderate trade winds and sea breeze effects create conditions favorable for afternoon cloud development and rain, primarily affecting Pacific regions.
Mornings: Partly cloudy across the country with generally pleasant conditions.
Afternoons: North Pacific remains mostly cloudy with possible rain in the Nicoya Peninsula on Tuesday. Central and South Pacific see mostly cloudy skies with showers and thunderstorms. Central Valley experiences partly cloudy conditions with possible isolated showers. Northern Zone and Caribbean stay partly cloudy with possible mountain showers.
Nights: Pacific and Central Valley remain partly cloudy with possible rain in Central and South Pacific areas. Moderate winds in the Greater Metropolitan Area (GAM) and Guanacaste.
Trade winds increase and humidity decreases, establishing stable weather patterns across most regions.
Mornings: Partly cloudy nationwide. Scattered showers possible in the Caribbean and Northern Zone during the second half of the week.
Afternoons: North Pacific stays mostly cloudy. Central and South Pacific see decreasing rain chances starting Thursday. Central Valley remains partly cloudy with moderate winds, especially in mountainous areas. Northern Zone and Caribbean experience partly cloudy skies with possible mountain showers.
Nights: Partly cloudy in Pacific and Central Valley. Moderate to strong winds in the GAM and Guanacaste during the second half of the week.
Central & South Pacific: Active Tuesday-Wednesday with afternoon showers and thunderstorms. Rain chances decrease significantly from Thursday onward as dry season patterns strengthen.
Central Valley: Mostly stable with possible isolated afternoon showers Tuesday-Wednesday. Moderate winds pick up Thursday, particularly in mountainous areas.
North Pacific/Nicoya Peninsula: Possible rain Tuesday in Nicoya Peninsula, otherwise mostly cloudy to partly cloudy. Winds strengthen Thursday through weekend.
Caribbean & Northern Zone: Light morning and evening rain possible during the week’s second half. Mountain areas see occasional showers throughout.
Winds: Moderate winds increase to stronger levels Thursday-Sunday, particularly affecting the GAM and Guanacaste.
| Region | High °C (°F) | Low °C (°F) |
|---|---|---|
| Central Valley | 31° (87.8°) | 15° (59°) |
| North Pacific | 34° (93.2°) | 20° (68°) |
| Central Pacific | 33° (91.4°) | 15° (59°) |
| South Pacific | 33° (91.4°) | 15° (59°) |
| Caribbean | 32° (89.6°) | 20° (68°) |
| Northern Zone | 34° (93.2°) | 17° (62.6°) |
This forecast is based on outlooks from Costa Rica’s National Meteorological Institute (IMN).
