Its sister station, BBC Radio Cymru 2, providing separate music-led programming at certain hours of the day, broadcasts on digital and online platforms.

This was followed at 7am by the first edition of the breakfast magazine show Helo Bobol!, presented by Hywel Gwynfryn with contributions from a network of local reporters in studios across Wales.

In November 1979, Radio Cymru's programming was expanded to 65 hours a week, introducing mid-morning output on weekdays, along with a growing line-up of dramas, light entertainment and documentaries.

Later developments in the 21st century saw Radio Cymru introducing a nightly youth strand, C2, and regional opt-outs for South West Wales, which were axed in 2008 but later reintroduced to provide live commentary of Swansea City A.F.C.

Initially providing a music and entertainment alternative to its breakfast news programme, the station gradually expanded its own programming while continuing to simulcast output from the main Radio Cymru service.