December to April is the dry season on the Pacific, and the beach towns fill up. May to November is the green season: the forest is full, and the rain usually holds off until afternoon. The Caribbean does not use that calendar. These guides are for the weather, both coasts, the towns, getting around, and daily life after you land.
The coast least like the Pacific. The rain does not follow the Guanacaste calendar.
A dry Pacific beach, rain on the Caribbean, and a cool night in the Central Valley can all be the same week. Butterflies cross the country. Rivers come down off the mountains. None of that stops for the month you picked.
Map of Costa Rica
Costa Rica has seven provinces. Use these pages when you want the administrative side, or a short overview of one province. Towns and regions are the path for planning a trip.
Costa Rica has 30 national parks. Tickets and rules are on the parks hub. The busiest parks sell tickets online, so book before you go.
Leatherbacks nest on the Pacific from October to February. Humpbacks are offshore at Uvita from about July to October. A December-to-April sighting is reported some years.