Geography & Climate Our Lady Health - Velankanni Geography & Climate Vailankanni, a hamlet on the sandy shores of the Bay of Bengal, is located 350 kilometers south of Chennai and 14 km south of Nagapattinam on the Coramandal coast, at 10.40°N 79.49°E inNagapattinam district of Tamil nadu state. MapVelankanni 2:43 pm, June 7, 2023 36°Cbroken clouds Wind: 16 mph Pressure: 1004 mb Visibility: 10 km Sunrise: 5:47 am Sunset: 6:31 pm Weather from OpenWeatherMap