OPW's notice says the friary is open daily 09:30 to 17:00, with no season or closed dates printed; it is an unguided open-air national monument with no staff or facilities. Allow about 35 minutes. OPW warns that care and caution should be kept throughout a visit to its unguided sites.
The cloister is dark inside and the entrance is not wheelchair accessible by Google's reckoning; the graveyard around and inside the ruins is still in use.
Dogs: Dogs are not permitted on the Mid Clare Way, the official waymarked route through Quin.
Photo: Quin Friary's tower and roofless church and cloister ranges on a green rise above Quin village, with a path leading up to the graveyard wall. Michael Deligan, CC BY-SA 4.0. Source: https://commons.wikimedia.org/wiki/File:Quin_Franciscan_Friary_in_County_Clare.jpg. Licence: https://creativecommons.org/licenses/by-sa/4.0. Resized and cropped for display; derivatives retain the source licence.