Weather is probably a major factor when you plan your trip to Koggala, but bear 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 temperature of 28°C, while the coldest months are January and February, with an average of 27°C. The rainiest months in Koggala are May, November, September and October, with each month seeing an average of 305 mm of rainfall.