Weather will likely play an important role when you plan your trip to Tangalle, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually March and April with an average temp of 81°F, while the coldest months are January and February with an average of 79°F. The rainiest months in Tangalle are November, May, October, and December, with each month seeing an average of 10 inches of rainfall.