| No | Programme Title | Transmission Date and Time | Company | Thousands of Viewers |
|---|---|---|---|---|
| 1 | POBOL Y CWM | Friday (20:00) and Sunday (20:20) | BBC Cymru | 55 |
| 2 | POBOL Y CWM | Thursday (19:30) and Sunday (20:00) | BBC Cymru | 49 |
| 3 | POBOL Y CWM | Monday (20:00) and Sunday (19:00) | BBC Cymru | 47 |
| 4 | Y SIOE 2018 | Tuesday (20:00) and Tuesday (23:00) | Boom Cymru TV | 44 |
| 5 | POBOL Y CWM | Wednesday (20:00) and Sunday (19:40) | BBC Cymru | 42 |
| = | POBOL Y CWM | Tuesday (19:30) and Sunday (19:20) | BBC Cymru | 42 |
| 7 | NEWYDDION 9 | Monday (21:00) | BBC Cymru | 34 |
| = | Y SIOE 2018 | Monday (20:25) and Tuesday (00:05) | Boom Cymru TV | 34 |
| 9 | Y SIOE 2018 | Monday (21:30) and Tuesday (00:35) | Boom Cymru TV | 32 |
| 10 | Y SIOE 2018 | Sunday (21:00), Wednesday W31 (23:00) and Friday W31 (13:00) | Boom Cymru TV | 26 |
| 11 | NEWYDDION 9 | Wednesday (21:00) | BBC Cymru | 23 |
| 12 | GUTO GWNINGEN | Friday (10:30) | SAIN | 22 |
| 13 | Y SIOE 2018 | Wednesday (21:30) and Wednesday (23:30) | Boom Cymru TV | 21 |
| 14 | CWPWRDD CADI | Friday (08:15) | Taffy Entertainment | 21 |
| = | NEWYDDION 9 | Thursday (21:00) | BBC Cymru | 21 |
| 16 | NOSON LAWEN | Saturday (20:00) | Cwmni Da | 20 |
| = | NEWYDDION 9 | Tuesday (21:00) | BBC Cymru | 20 |
| = | SEICLO: LE TOUR DE FRANCE | Sunday (15:00) | Sunset & Vine / Tinopolis | 20 |
| 19 | HENO | Monday (19:00) | Tinopolis | 19 |
| 20 | Y SIOE 2018 | Thursday (20:00) and Thursday (23:00) | Boom Cymru TV | 17 |
| = | SEICLO: LE TOUR DE FRANCE | Saturday (21:30) | Sunset & Vine / SMS | 17 |
