| 2021-04-27 14:30:31Tuesday, April 27, 2021 | Rhiwbina  | Cancelled |  Windsor, Penarth | Alliance | Rhiwbina Recreation Club |
| 2021-04-28 18:00:21Wednesday, April 28, 2021 | Rhiwbina | Cancelled - rain |  St. Fagan's | CMWL | Rhiwbina Recreation Club |
| 2021-05-01 14:30:36Saturday, May 1, 2021 | Rhiwbina | 62 (6 pts) - 13 (0 pts) |  Cardiff Athletic | PG2 | Rhiwbina Recreation Club |
| 2021-05-04 14:30:46Tuesday, May 4, 2021 | St. Fagan's | 44 - 59 | Rhiwbina | Alliance | St. Fagan's Bowls Club |
| 2021-05-08 14:30:38Saturday, May 8, 2021 | Rhiwbina | 76 (6 pts) - 49 (0 pts) |  Pontyclun | PG2 | Rhiwbina Recreation Club |
| 2021-05-09 14:30:15Sunday, May 9, 2021 | Rhiwbina | 76 - 59 |  St. Alban's | WBA | Rhiwbina Recreation Club |
| 2021-05-11 14:30:13Tuesday, May 11, 2021 | Rhiwbina | 60 - 64 |  Cardiff | Alliance | Rhiwbina Recreation Club |
| 2021-05-12 18:00:45Wednesday, May 12, 2021 | Rhiwbina | 65 - 35 |  Mackintosh | CMWL | Rhiwbina Recreation Club |
| 2021-05-15 14:30:30Saturday, May 15, 2021 | St. Joseph's  | 52 (0 pts) - 60 (6 pts) | Rhiwbina | PG2 | St. Joseph's Bowls Club |
| 2021-05-15 14:30:33Saturday, May 15, 2021 | Llantrisant  | 92 - 52 | Rhiwbina | WBA | Llantrisant Bowls Club |
| 2021-05-19 18:00:43Wednesday, May 19, 2021 | Cardiff | 59 - 83 | Rhiwbina | CMWL | Cardiff Bowling Club |
| 2021-05-20 14:30:27Thursday, May 20, 2021 | Rhiwbina | Cancelled - rain |  Penarth | Alliance | Rhiwbina Recreation Club |
| 2021-05-22 14:30:52Saturday, May 22, 2021 | Rhiwbina | 80 - 45 |  Pentyrch | WBA | Rhiwbina Recreation Club |
| 2021-05-25 14:30:39Tuesday, May 25, 2021 | Pontyclun | Cancelled - rain | Rhiwbina | Alliance | Pontyclun Athletic Bowls Club |
| 2021-05-26 18:00:00Wednesday, May 26, 2021 | Rhiwbina | 56 - 69 | Cardiff Athletic | CMWL | Rhiwbina Recreation Club |
| 2021-05-29 14:30:53Saturday, May 29, 2021 | Ely Valley  | 21 (0 pts) - 41 (6 pts) | Rhiwbina | PG2 | Ely Valley Bowling Club |
| 2021-06-01 14:30:57Tuesday, June 1, 2021 | Rhiwbina | 75 - 76 |  Whitchurch Hospital | Alliance | Rhiwbina Recreation Club |
| 2021-06-02 18:00:50Wednesday, June 2, 2021 | Whitchurch Hospital | 73.5 (0 pts) - 78 (6 pts) | Rhiwbina | PG2 | Whitchurch Hospital Bowls Club |
| 2021-06-05 14:30:57Saturday, June 5, 2021 | Rhiwbina | 72 (6 pts) - 58 (0 pts) |  Barry Romilly | PG2 | Rhiwbina Recreation Club |
| 2021-06-08 14:30:42Tuesday, June 8, 2021 | Rhiwbina | 66 - 64 | Cardiff Athletic | Alliance | Rhiwbina Recreation Club |
| 2021-06-09 18:00:49Wednesday, June 9, 2021 | Rhiwbina | Cancelled | Pentyrch | CMWL | Rhiwbina Recreation Club |
| 2021-06-12 14:30:28Saturday, June 12, 2021 | Llanbradach  | 98 (14 pts) - 58 (0 pts) | Rhiwbina | PG1 | Llanbradach Bowling Club |
| 2021-06-12 14:30:34Saturday, June 12, 2021 | Rhiwbina | 83 (6 pts) - 35 (0 pts) | Llanbradach | PG2 | Rhiwbina Recreation Club |
| 2021-06-15 14:30:32Tuesday, June 15, 2021 | Rhiwbina | 55 - 75 | St. Joseph's | Alliance | Rhiwbina Recreation Club |
| 2021-06-16 18:00:48Wednesday, June 16, 2021 | Taff's Well  | 18:00:486:00 pm | Rhiwbina | CMWL | Taff's Well Bowling Club |
| 2021-06-19 14:30:34Saturday, June 19, 2021 | Windsor, Penarth | 71 (3 pts) - 77 (11 pts) | Rhiwbina | PG1 | Windsor Bowls Club |
| 2021-06-19 14:30:50Saturday, June 19, 2021 | Rhiwbina | 50 (6 pts) - 39 (0 pts) | Windsor, Penarth | PG2 | Rhiwbina Recreation Club |
| 2021-06-22 14:30:40Tuesday, June 22, 2021 | Mackintosh | 51 - 37 | Rhiwbina | Alliance | Mackintosh Bowling Club |
| 2021-06-23 18:00:46Wednesday, June 23, 2021 | Rhiwbina | 67 (6 pts) - 55 (0 pts) |  Penylan | CMWL | Rhiwbina Recreation Club |
| 2021-06-26 14:30:14Saturday, June 26, 2021 | Barry Athletic  | 106 (14 pts) - 54 (0 pts) | Rhiwbina | PG1 | Barry Athletic Bowls Club |
| 2021-06-26 14:30:20Saturday, June 26, 2021 | Rhiwbina | 54 (6 pts) - 35 (0 pts) | Barry Athletic | PG2 | Rhiwbina Recreation Club |
| 2021-06-29 14:30:08Tuesday, June 29, 2021 | Rhiwbina | 58 - 61 |  Whitchurch | Alliance | Rhiwbina Recreation Club |
| 2021-06-30 18:00:59Wednesday, June 30, 2021 | St. Fagan's | 58 (0 pts) - 64 (6 pts) | Rhiwbina | CMWL | St. Fagan's Bowls Club |
| 2021-07-03 14:30:37Saturday, July 3, 2021 | Rhiwbina | 49 (0 pts) - 104 (14 pts) |  Beaufort | PG1 | Rhiwbina Recreation Club |
| 2021-07-03 14:30:55Saturday, July 3, 2021 | Llantrisant | 66 - 40 | Rhiwbina | Friendly | Llantrisant Bowls Club |
| 2021-07-06 14:30:22Tuesday, July 6, 2021 | Rhiwbina | 46 - 73 | Penylan | Alliance | Rhiwbina Recreation Club |
| 2021-07-07 18:00:08Wednesday, July 7, 2021 | Rhiwbina | 52 (0 pts) - 78 (6 pts) | Whitchurch | CMWL | Rhiwbina Recreation Club |
| 2021-07-08 14:30:34Thursday, July 8, 2021 | Rhiwbina | 66 - 81 |  Welsh VIs | Friendly | Rhiwbina Recreation Club |
| 2021-07-11 14:30:24Sunday, July 11, 2021 | Cardiff | 93 (10 pts) - 62 (4 pts) | Rhiwbina | PG1 | Cardiff Bowling Club |
| 2021-07-13 14:30:45Tuesday, July 13, 2021 | Windsor, Penarth | See PG2 - June 19 | Rhiwbina | Alliance | Windsor Bowls Club |
| 2021-07-14 18:00:10Wednesday, July 14, 2021 | Mackintosh | 53 (0 pts) - 86 (6 pts) | Rhiwbina | CMWL | Mackintosh Bowling Club |
| 2021-07-17 14:30:07Saturday, July 17, 2021 | Rhiwbina | 78 (6 pts) - 35 (0 pts) | Whitchurch Hospital | PG2 | Rhiwbina Recreation Club |
| 2021-07-20 14:30:05Tuesday, July 20, 2021 | Rhiwbina | 41 - 54 | St. Fagan's | Alliance | Rhiwbina Recreation Club |
| 2021-07-21 18:00:17Wednesday, July 21, 2021 | Rhiwbina | 48 (0 pts) - 73 (6 pts) | Cardiff | CMWL | Rhiwbina Recreation Club |
| 2021-07-22 14:30:26Thursday, July 22, 2021 | Rhiwbina | 76 - 96 |  WBA President | Friendly | Rhiwbina Recreation Club |
| 2021-07-24 14:30:10Saturday, July 24, 2021 | St. Fagan's | 85 (6 pts) - 72 (0 pts) | Rhiwbina | PG2 | St. Fagan's Bowls Club |
| 2021-07-24 14:30:30Saturday, July 24, 2021 | Rhiwbina | 91 (12 pts) - 73 (2 pts) | St. Fagan's | PG1 | Rhiwbina Recreation Club |
| 2021-07-27 14:30:32Tuesday, July 27, 2021 | Cardiff | 66 - 65 | Rhiwbina | Alliance | Cardiff Bowling Club |
| 2021-07-28 18:00:18Wednesday, July 28, 2021 | Cardiff Athletic | 79 (6 pts) - 59 (0 pts) | Rhiwbina | CMWL | Cardiff Athletic Bowls Club |
| 2021-07-31 14:30:23Saturday, July 31, 2021 | Windsor, Penarth | 26 (0 pts) - 36 (6 pts) | Rhiwbina | PG2 | Windsor Bowls Club |
| 2021-07-31 14:30:26Saturday, July 31, 2021 | Rhiwbina | 76 (10 pts) - 72 (4 pts) | Windsor, Penarth | PG1 | Rhiwbina Recreation Club |
| 2021-08-03 14:30:35Tuesday, August 3, 2021 | Penarth | 45 - 50 | Rhiwbina | Alliance | Penarth Bowling Club |
| 2021-08-04 18:00:32Wednesday, August 4, 2021 | Rhiwbina | 85 (6 pts) - 55 (0 pts) | Whitchurch Hospital | CMWL | Rhiwbina Recreation Club |
| 2021-08-07 14:30:17Saturday, August 7, 2021 | Barry Romilly | 107 (6 pts) - 40 (0 pts) | Rhiwbina | PG2 | Barry Romilly Bowling Club |
| 2021-08-07 14:30:40Saturday, August 7, 2021 | Rhiwbina | 60 (0 pts) - 96 (14 pts) | Cardiff | PG1 | Rhiwbina Recreation Club |
| 2021-08-08 14:30:47Sunday, August 8, 2021 | Olveston  | 85 - 96 | Rhiwbina | Friendly - Mixed | Olveston & District Bowling Club |
| 2021-08-10 14:30:38Tuesday, August 10, 2021 | Rhiwbina | 80 - 54 | Pontyclun | Alliance | Rhiwbina Recreation Club |
| 2021-08-11 18:00:39Wednesday, August 11, 2021 | Pentyrch | 69 (6 pts) - 50 (0 pts) | Rhiwbina | CMWL | Pentyrch Bowling Club |
| 2021-08-14 14:30:44Saturday, August 14, 2021 | Rhiwbina | 82 (6 pts) - 63 (0 pts) | St. Fagan's | PG2 | Rhiwbina Recreation Club |
| 2021-08-14 14:30:55Saturday, August 14, 2021 | St. Fagan's | 75 (12 pts) - 68 (2 pts) | Rhiwbina | PG1 | St. Fagan's Bowls Club |
| 2021-08-17 14:30:24Tuesday, August 17, 2021 | Whitchurch Hospital | 54 - 70 | Rhiwbina | Alliance | Whitchurch Hospital Bowls Club |
| 2021-08-18 18:00:56Wednesday, August 18, 2021 | Rhiwbina | 56 (0 pts) - 68 (6 pts) | Taff's Well | CMWL | Rhiwbina Recreation Club |
| 2021-08-19 18:00:59Thursday, August 19, 2021 | Cardiff Athletic | 77 (6 pts) - 67 (0 pts) | Rhiwbina | PG2 | Cardiff Athletic Bowls Club |
| 2021-08-21 14:30:08Saturday, August 21, 2021 | Beaufort | 105 (14 pts) - 49 (0 pts) | Rhiwbina | PG1 | Beaufort Bowls Club |
| 2021-08-21 14:30:18Saturday, August 21, 2021 | Rhiwbina | 68 (6 pts) - 47 (0 pts) | Ely Valley | PG2 | Rhiwbina Recreation Club |
| 2021-08-24 14:30:30Tuesday, August 24, 2021 | Cardiff Athletic | 63 - 30 | Rhiwbina | Alliance | Cardiff Athletic Bowls Club |
| 2021-08-25 18:00:54Wednesday, August 25, 2021 | Whitchurch | 71 - 60 | Rhiwbina | Friendly | Whitchurch Bowling Club |
| 2021-08-26 18:00:34Thursday, August 26, 2021 | Rhiwbina | 76 (0 pts) - 85 (6 pts) | St. Joseph's | PG2 | Rhiwbina Recreation Club |
| 2021-08-28 14:30:11Saturday, August 28, 2021 | Llanbradach | 62.75 (6 pts) - 35 (0 pts) | Rhiwbina | PG2 | Llanbradach Bowling Club |
| 2021-08-28 14:30:17Saturday, August 28, 2021 | Rhiwbina | 69 (2pts) - 80 (12 pts) | Llanbradach | PG1 | Rhiwbina Recreation Club |
| 2021-08-31 14:30:25Tuesday, August 31, 2021 | Rhiwbina | 80 - 79 | Mackintosh | Alliance | Rhiwbina Recreation Club |
| 2021-09-02 18:00:20Thursday, September 2, 2021 | Pontyclun | 48 (6 pts) - 36 (0 pts) | Rhiwbina | PG2 | Pontyclun Athletic Bowls Club |
| 2021-09-07 14:30:34Tuesday, September 7, 2021 | St. Joseph's | 54 - 56 | Rhiwbina | Alliance | St. Joseph's Bowls Club |
| 2021-09-11 14:30:44Saturday, September 11, 2021 | Barry Athletic | 64 (6 pts) - 52 (0 pts) | Rhiwbina | PG2 | Barry Athletic Bowls Club |
| 2021-09-11 14:30:50Saturday, September 11, 2021 | Rhiwbina | 70 (10 pts) - 69 (4 pts) | Barry Athletic | PG1 | Rhiwbina Recreation Club |
| 2021-09-13 14:30:56Monday, September 13, 2021 | Shanklin  | 107 - 109 | Rhiwbina | Tour | |
| 2021-09-14 14:30:03Tuesday, September 14, 2021 | Whitchurch | 52 - 37 | Rhiwbina | Alliance | Whitchurch Bowling Club |
| 2021-09-14 14:30:59Tuesday, September 14, 2021 | Camp Hill  | 99 - 125 | Rhiwbina | Tour | |
| 2021-09-15 14:30:57Wednesday, September 15, 2021 | Ventnor  | 91 - 89 | Rhiwbina | Tour | |
| 2021-09-16 14:30:57Thursday, September 16, 2021 | Plessey  | 87 - 97 | Rhiwbina | Tour | |