Dr Williams also presented a long service certificate to Sue Beales, who has been big supporter of the Children in Need charity.
He then went on to speak to 80 people in the Boathouse on his personal journey.
Mr [Sean] Finlay said: “He was able to hold us spellbound for 45 minutes.
“Rowan is very engaging and spoke about how he started as a Presbyterian in Wales before progressing into the Anglican church.”