Pornic (Pornizh in Breton) is a commune in the Loire-Atlantiquedépartement, in South-Eastern Brittany, in western France. In 1973 the commune of Pornic absorbed the neighbouring municipalities of Sainte-Marie-sur-Mer and Clion-sur-Mer, whose inhabitants were called respectively Sanmaritains and Clionnais. These former municipalities are now two subdivisions of Pornic.
Pornic has a Csb type climate (Mediterranean with mild summers). The highest temperature recorded in Pornic is 38.1°C on 4 August 2003, while the lowest temperature was -11.2°C on 2 February 1986. Pornic's average temperature between 1971 and 2000 is approximately 12.8°C.