Best places to go in Costa Rica during the rainy season For example, the south pacific region is the rainiest part of the Latin American country. As you move north and towards the Caribbean, the weather becomes drier. To avoid the heaviest rainfall, we recommend a visit to the Caribbean town of Puerto Viejo.

In 2026, the "rainy side" of Costa Rica typically refers to the Caribbean coast (Limon province), which follows a weather pattern distinct from the rest of the country. While the Pacific side and Central Valley experience a defined "Green Season" from May to November, the Caribbean side can experience heavy rainfall year-round. Interestingly, the rainiest month for the Caribbean is often July, whereas October—the wettest month for the Pacific—is actually the "summer" or driest month for the Caribbean. This microclimate variation is caused by the central mountain ranges blocking trade winds, creating a rain-shadow effect. For travelers, this means if it is pouring on the popular beaches of Manuel Antonio in October, it is likely sunny and beautiful in Puerto Viejo on the Caribbean side.