The Tafwyl festival is an annual Welsh-language festival which takes place in Cardiff, Wales.
The event was set up in 2006 and initially took place on a small scale outside the Mochyn Du pub near the city centre. Since 2012 it has been held at Cardiff Castle or in Bute Park. In July 2017 it is scheduled to take place in Llandaff Fields. It forms part of a series of summer festivals entitled Cardiff Festivals.
The main festival is free to enter and, in 2015, attracted 34,000 visitors.