Head to Head
| England Development League 2 | 2025/05/02 13:00 | Cardiff U21 v Watford U21 | L | 3-1 |
| England Development League 2 | 2025/04/25 13:00 | Watford U21 v Cardiff U21 | W | 2-1 |
| England U21 Premier League Cup | 2024/12/19 19:00 | Cardiff U21 v Watford U21 | L | 3-1 |
| England U21 Premier League Cup | 2024/10/17 17:00 | Watford U21 v Cardiff U21 | L | 0-2 |
| England Development League 2 | 2024/01/08 14:00 | Cardiff U21 v Watford U21 | D | 0-0 |
| England Development League 2 | 2023/10/24 12:00 | Watford U21 v Cardiff U21 | D | 2-2 |
| England Development League 2 | 2023/01/24 13:00 | Cardiff U21 v Watford U21 | W | 0-3 |
| England Development League 2 | 2022/10/18 12:00 | Watford U21 v Cardiff U21 | L | 0-1 |
Home History
| England Development League 2 | 2025/05/05 13:00 | Watford U21 v Sheffield Wed U21 | D | 1-1 |
| England Development League 2 | 2025/05/02 13:00 | Cardiff U21 v Watford U21 | L | 3-1 |
| England Development League 2 | 2025/04/25 13:00 | Watford U21 v Cardiff U21 | W | 2-1 |
| England Development League 2 | 2025/04/22 12:00 | Burnley U21 v Watford U21 | L | 4-1 |
| England Development League 2 | 2025/04/18 12:00 | Watford U21 v Brentford U21 | W | 2-1 |
| England Development League 2 | 2025/04/11 12:00 | Watford U21 v Peterborough U21 | L | 1-2 |
| England Development League 2 | 2025/04/04 13:00 | Barnsley U21 v Watford U21 | D | 1-1 |
| England Development League 2 | 2025/03/31 13:00 | Watford U21 v Coventry U21 | L | 1-2 |
Away History
| Wales League Cup | 2025/08/01 18:30 | Cambrian United v Cardiff U21 | L | 2-0 |
| UK Friendlies | 2025/07/25 18:30 | Merthyr Town v Cardiff U21 | W | 4-6 |
| Wales League Cup | 2025/07/19 13:30 | Ammanford AFC v Cardiff U21 | W | 0-3 |
| UK Friendlies | 2025/07/15 18:30 | Yeovil v Cardiff U21 | W | 2-3 |
| England Development League 2 | 2025/05/06 13:00 | Cardiff U21 v Burnley U21 | L | 1-4 |
| England Development League 2 | 2025/05/02 13:00 | Cardiff U21 v Watford U21 | W | 3-1 |
| England Development League 2 | 2025/04/29 11:00 | Hull U21 v Cardiff U21 | L | 2-0 |
| England Development League 2 | 2025/04/25 13:00 | Watford U21 v Cardiff U21 | L | 2-1 |