Alwaneri is located in the Southern part of Tirunelveli Districti Nanguneri Taluk. Tirunelveli is located around 18 km North of Alwaneri. The population of Alwaneri is about 1200 of who all speak Tamil and a majority follow Christianity.
Alwaneri is located 8.608396, 77.755832 or 8°36'30.2"N 77°45'21.0"E. The climate here is dry tropical with Monsoon rains which occor in the months of October, November and December. Maximum Temperatures are reached here during summer months of April, May and June and Minimum Temperatures here are reached in the month of October, November and December.