Weather is probably a major factor when you plan your trip to Isla de Coiba, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April, with an average temperature of 28°C, while the coldest months are January and December, with an average of 27°C. The rainiest months in Isla de Coiba are August, May, July and October, with each month seeing an average of 554 mm of rainfall.