When it launched in December 1998 as Champion 103, it was the first commercial radio station to serve Anglesey and Gwynedd as a whole, although Marcher Coast 96.3 had been broadcasting to a small part of the area for some time from its Colwyn Bay studios.

Originally owned and operated by the Marcher Radio Group, Champion 103 broadcast from studios at Parc Menai in Bangor, Gwynedd - later sharing its facilities with Coast 96.3.

In July 2010, Global closed the Bangor studios and moved Heart Cymru's operations to the former Marcher headquarters in Gwersyllt, near Wrexham.

All local output, including extended Welsh language shows, news bulletins and network opt-outs were retained.

[5] In January 2025, it was reported that Capital Cymru would cease all of its Welsh language programming following the broadcast regulator Ofcom's decision to relax local content obligations for commercial radio, apart from news.

[9] Capital Cymru broadcasts hourly localised news updates from 6 am–7 pm on weekdays and 6 am–12 midday at weekends.