Weather is probably a major factor when you plan your trip to Mariveles, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and April with an average temp of 83°F, while the coldest months are January and February with an average of 79°F. The rainiest months in Mariveles are July, August, September, and June, with each month seeing an average of 20 inches of rainfall.