Weather will likely play an important role when you plan your trip to Port Blair, 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 81°F. The rainiest months in Port Blair are September, June, July, and August, with each month seeing an average of 16 inches of rainfall.