Casuarina Beach is in Karainagar, Jaffna District, Sri Lanka, about 20 kilometres (12 mi) from Jaffna. The Casuarina Beach in Karainagar is also called and written as Casoorina, Cashoorina and few other variants. This is considered to be the best beach in the Jaffna Peninsula with white sand.

The beach gets its name because of the Casuarina trees lined along the beach.^[1] The beach extends for about 1.5 km.