In May, the weather in Tortuguero is typically hot. Average daily high temperature in May is about 30 degrees above zero. On average, Tortuguero has 23 rainy, 4 cloudy, 3 sunny, and 1 partly cloudy day in May. The rains are usually heavy. May as well as January, June, July, and August is considered the most uncomfortable time to visit Tortuguero.