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 5:18 pm, February 5, 2023 25°Cbroken clouds Wind: 12 mph Pressure: 1010 mb Visibility: 10 km Sunrise: 6:33 am Sunset: 6:15 pm Weather from OpenWeatherMap