Weather is probably a major factor when you plan your trip to Guarapari, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January with an average temp of 77°F, while the coldest months are August and July with an average of 70°F. The rainiest months in Guarapari are December, November, March, and January, with each month seeing an average of 7 inches of rainfall.