Taking into account the local weather in Puerto Viejo de Sarapiqui is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually March and April with an average temp of 69°F, while the coldest months are January and February with an average of 68°F. The rainiest months in Puerto Viejo de Sarapiqui are October, June, September, and August, with each month seeing an average of 22 inches of rainfall.