Retired butcher Lewis Stone – who was from Burton on Trent and had a holiday home in the area - passed away last week.
Mr Stone spent several months in a coma following the attack close to the Borth Wildlife Kingdom when he was walking his dog on 28 February.
David Kenneth Fleet, 20, has been charged with attempted murder and possessing an offensive weapon.
Police told the Cambrian News that the Crown Prosecution Service is now reconsidering the charges following Mr Lewis’ death.
Fleet, of High Street, Borth is being remanded in custody at the Caswell Clinic near Bridgend.
He is due to appear in court again on 14 June, with a provisional trial date was set for 27 August.
A police spokeswoman said: “Dyfed-Powys Police can sadly confirm the death of Lewis Stone, following an incident in Borth on 28 February.
“Mr Stone, aged 71, was walking his dog near the Borth Wildlife Kingdom when he was stabbed. He passed away this week.
“Our thoughts are with his family at this tragic time.”
She added that the police investigation into the incident is continuing.