Surat is a city in Gujarat, India. Surat is a port city and administrative headquarters of the Surat District. As of 2009, Surat and its metropolitan area had a population of approximately 5.9 million. It is the second largest city in Gujarat and eighth largest in India. Surat is a major gem stone center, and over 92% of the world’s diamonds are cut here. The city is located on the banks of the Tapti River, and was a major port during the British colonial era. However, due to damming projects, the Tapti River become unnavigable and a new port was constructed down stream at the suburb of Hazira. The city is located at 21.17 N 72.83 E. and is very low lying. The STD code of Surat is 0261. Climate: The climate is tropical and the city receives the full impact of the monsoon. Winter Temperature: Max 31 deg C, Min 12 deg C Summer Temperature: Max 42 deg C, Min 24 deg C Rainfall: mid-June to mid-September 931.9 mm Lowest Recorded Temperature: 6.5 deg C Highest Recorded Temperature: 48 deg C.