The best time to visit Costa Rica is during the dry season, from December through April, when rainfall is lowest across most of the country and outdoor activities like hiking, zip-lining, and beach time are least likely to be interrupted by rain.

Dry Season (December-April): Peak Travel Time

Known locally as “verano” (summer) despite falling in the Northern Hemisphere’s winter, this stretch brings the most reliably sunny days, especially in the Guanacaste region on the Pacific coast, which sees the least rainfall of anywhere in the country. It is also peak tourist season, with the highest prices and busiest national parks, particularly around the December-to-January holidays.

Green Season (May-November): Lush, Quiet, and Still Very Visitable

Costa Ricans call the wet season “invierno” (winter), but it is far from a washout: rain typically arrives as intense but short afternoon downpours, leaving mornings clear for hiking and wildlife viewing. The landscape turns dramatically lush and green, wildlife is often more active, and both crowds and prices drop significantly compared to the dry season.

Regional Differences Matter

Costa Rica’s Pacific and Caribbean coasts follow different rainfall patterns, and the Caribbean side, including popular spots like Puerto Viejo, tends to stay wetter year-round with less pronounced seasonal swings than the Pacific coast. The Central Valley, home to San Jose, sits at higher elevation and enjoys a milder, spring-like climate for most of the year regardless of season.

September and October: The Wettest Stretch

If you are set on visiting during the green season, September and October bring the heaviest rainfall on the Pacific side and are worth avoiding if a dry trip matters to you, while the Caribbean coast actually tends to see a brief drier spell around this same period, an example of how much the two coasts diverge.

Planning Around Afternoon Rain

Because Costa Rica’s wet-season rain is so reliably an afternoon event, scheduling outdoor activities like hikes and canopy tours for the morning and checking a live rain map before heading out in the afternoon is one of the simplest ways to make the most of a green-season trip.

In Conclusion

December through April offers the most reliably dry weather, but the green season’s lush scenery, thinner crowds, and lower prices make it a legitimate choice too, especially if you plan around the predictable afternoon rain pattern.