Rachel Bromwich raises questions over the location, stating: "There is no certainty, however, that in twelfth century tradition Maes Gwyddneu did represent the submerged land in Cardigan Bay."

[4] In the tale of Culhwch and Olwen, one of the Welsh Triads, one of the men at Arthur's court is named as Teithi Hen ap Gwynnan, whose land was inundated, and only he escaped.

In 1770, Welsh antiquarian scholar William Owen Pughe reported seeing sunken human habitations about four miles (6 km) off the Ceredigion coast, between the rivers Ystwyth and Teifi.

"Lewis takes the view that maps by the cartographer Ptolemy marked the coastline of Cardigan Bay in the same location as it appears in modern times, suggesting that the flood occurred before the second century AD.

Modern geologists surmise that these formations of clay, gravel and rocks are moraines formed by the action of melting glaciers at the end of the last ice age.

[12] In 2022, geographer Simon Haslett and linguist David Willis published research suggesting that the medieval Gough Map provides evidence for two offshore islands within Cardigan Bay.

The physical remains of the preserved sunken forest at Borth, and of Sarn Badrig nearby, could have suggested that some great tragedy had overcome a community there long ago and so the myth may have grown from that.

A weaker parallel is the Gaelic otherworld Tír na nÓg ('Land of Youth'), often conceived of a mystical land reached via a sea voyage; however, it lacks an inundation myth.

[15] At the 1925 National Eisteddfod of Wales, held in Pwllheli, Dewi Morgan ('Dewi Teifi') won the Bardic Chair with his Awdl recounting the legend, adopting Thomas Love Peacock's version as the basis for his poetic rendition.

[19] An art installation by the sculptor Marcus Vergette, a bronze "Time and Tide Bell", was mounted beneath the jetty in Aberdyfi Harbour in July 2011 as a homage to the folk song.

[20][21] The story of Cantre'r Gwaelod was the theme of the song entitled "Y Bobl" that competed in the final of Cân i Gymru 2021, which was written by Daniel Williams and performed by Lily Beau.

An episode of the BBC CBeebies programme Telly Tales, first broadcast in 2009, featured a children's re-enactment of the legend of Cantre'r Gwaelod through a mixture of animation and live action.

Presenter Neil Oliver visited the sands of Aberdyfi and Ynyslas, near Borth, and examined the remains of the submerged forest and Sarn Badrig which are revealed at low tide, assisted by local historians and dendrochronologists.