There’s nothing like an all-inclusive vacation in Marea del Portillo to revive you, especially when you know what to expect from the elements. Here’s some info to help you choose when to book: The hottest months are usually August and July with an average temp of 82°F, while the coldest months are January and February with an average of 77°F. February and January are the driest months while May and September are the rainiest months.