Costa Rica is expected to continue having humid and unstable atmospheric conditions for the next few days. This will maintain the likelihood of rain throughout most areas. But like we mentioned last week, we are not talking about a complete washout for the whole country. In fact, we should get back to a more normal rainy season pattern for the second half of the week.
Here’s what’s happening with Costa Rica’s Forecast; several weather systems are converging:
First we have Tropical Wave #6 crossing over Costa Rica today (Monday). Where I am on the Pacific Coast, that meant an amazingly sunny start to the day but a downpour late morning and a rainy early afternoon. The sun was back out for the late afternoon but much of the country could have a rainy night.
Next we have the close proximity of the Intertropical Convergence Zone. The moisture from this will strengthen rainfall activity across different regions, especially during afternoons and extending into late evening hours starting the week.
There’s also a low-pressure system in the Pacific Ocean, south of El Salvador, that has high potential for cyclonic development. That’s going to continuing moving slowly northwestward, but it is still pumping moisture into Costa Rica’s atmosphere (more showers). This should clear out around mid-week.
Thursday, through the weekend we should see the return of the typical rainy season pattern. Look for sunny hot mornings with isolated afternoon showers and thunderstorms in the Pacific regions, Central Valley, Northern Zone, and Caribbean mountains.
Partly cloudy skies will dominate across the country – still great conditions for early morning activities and travel. Some coastal areas might experience possible rain during the early hours, particularly during the first part of the week as the weather systems pass through.
Expect cloudy conditions with showers and thunderstorms in the Pacific, Central Valley, and Northern Zone. The first part of the week will see more widespread precipitation as Tropical Wave 6 moves through, but conditions should become more typical and manageable as the week progresses. The Caribbean will maintain partly cloudy conditions with rain and showers mainly confined to mountain areas.
Cloud cover and rain will affect the Pacific and Northern Zone, while the Central Valley and Caribbean mountains can expect scattered showers during the first part of the night. These conditions will be most pronounced early in the week.
Temperatures remain comfortable and consistent with recent weeks, with the Central Valley continuing to offer those refreshingly cool overnight conditions perfect for restful sleep.
High: 31° (87.8°) | Low: 12° (53.6°)
High: 36° (96.8°) | 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°)
The encouraging news: This week has a clear trajectory – more active weather early in the week transitioning to typical rainy season patterns by Wednesday and beyond.
Strategic planning by timeframe:
Monday-Tuesday: These will be the most active weather days due to Tropical Wave 6’s passage. Plan indoor activities, cultural experiences, museums, or covered markets. If you’re doing outdoor activities, stick to morning hours and have flexible backup plans.
Wednesday onwards: As the low-pressure system’s influence diminishes, expect a return to the familiar afternoon shower pattern. This means mornings and early afternoons become much more predictable for outdoor activities.
Regional advantages:
Caribbean lowlands: Continue to offer the most stable conditions, with mountain areas seeing most of the rainfall. Perfect for wildlife viewing, beach time, and cultural experiences.
Central Valley: Those pleasantly cool overnight temperatures make for comfortable accommodation, and morning conditions remain favorable for city exploration, coffee tours, and short hikes.
Pacific regions: While seeing more weather activity early in the week, the afternoon pattern later in the week is very manageable with proper planning.
This forecast is based on the weekly outlook shared by Costa Rica’s National Meteorological Institute (IMN).
