In August, the weather in Puerto Viejo de Sarapiquí is typically hot. Average daily high temperature in August is about 28 degrees above zero. On average, Puerto Viejo de Sarapiquí has 30 rainy and 1 cloudy day in August. The rains are usually heavy. August as well as January, April, May, and June is considered the most uncomfortable time to visit Puerto Viejo de Sarapiquí.