Mae gan yr awdurdod gynlluniau i gau Ysgol Uwchradd Llanrhymni a’r ysgol gyfagos, Ysgol Uwchradd  Rhymni, a sefydlu ysgol newydd o fis Medi 2014.  Cyn hynny, mae’r awdurdod yn bwriadu symud pob disgybl o Lanrhymni i safle Ysgol Uwchradd Rhymni o fis Medi 2013 fel y bydd y ddwy ysgol yn gweithredu ar yr un safle.
The authority has plans to close Llanrumney High School and the neighbouring Rumney High School and establish a new school effective from September 2014. Prior to that, the authority plans to move all of the pupils from Llanrumney to the Rumney High School site from September 2013 so that the two schools will operate on the same site.