If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Guarapari: 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.