The station plays chart music from the 1980s to the present day, alongside local news, weather, travel and community information.

[2] The station began broadcasting on Sunday 13 June 2004 from Radio Pembrokeshire's Narberth studios.

In September 2016, Nation Broadcasting announced plans to relocate Radio Carmarthenshire and its two sister services from the Narberth studios to the group's headquarters near the St Hilary transmitter on the outskirts of Cowbridge.

A weekly hour-long Welsh language music programme on Sunday evenings, shared with Radio Pembrokeshire.

[6] As of 2021, the station's local bulletins are produced under contract by Bauer's Swansea newsroom.