Siak Sri Indrapura is a town in Riau province of Indonesia and it is the capital of Siak Regency.ClimateThis city has a tropical climate. The is a great deal of rainfall in SIak Sri Indrapura, even in the driest month. This location is classified as Af by Köppen and Geiger. The average annual temperature in SIak Sri Indrapura is 26.9 °C. The average annual rainfall is 2390 mm.