Chengalpattu district is situated on the north east coast of Tamilnadu with a total geographical area of 2945 Sq.Kms. The district is bounded on the north by the Chennai district, West by the Kancheepuram district and Thiruvanamalai districts and on the south by the Vilupuram district. With a coastal length of 57 Kms, the district is bounded in the east by the Bay of Bengal. Chengalpattu features a tropical wet and dry climate. The fact that the district is close to the thermal equator and is also coastal prevents extreme variations in the seasonal temperature. The month of January with 25°C average temperature is the coldest month of the year. Average annual rainfall of the district is about 1400 mm. The district gets most of its annual seasonal rainfall from the north-east monsoon winds during the months of October and November.