The short service will begin at 10am. At 10.43 am, exactly 25 years since the bomb exploded in Enniskillen, a minute's silence will be observed.
The bells will ring At St. Macartin's Cathedral to mark the end of the act of remembrance.
During the service, there will be a reading by a church minister, hymns, an address and a wreath laying ceremony.
The service will be chaired by Mr. Austin Hunter.
Following the service at the Cenotaph, at 11.30am families of the bereaved have arranged a Church service in St. Macartin's Cathedral. After the Cathedral service, refreshments will be served in the Cathedral Hall.
Since April, the Ely Centre and families of the bereaved have been preparing for this year's landmark 25th Anniversary.
Plans are also on-going to create a permanent memorial to those who lost their lives in the bombing.
The Ely Centre received funding from Fermanagh District Council in June to recruit a consultant to carry out a feasibility study for a memorial.
"The initial plan was to have the feasibility study done for November but I don't think that is going to happen.
"We are looking for the consultant, before the end of the year, to provide us with a report to go forward," said Mr. Lee McDowell, Ely Centre Co-ordinator.
"As for location, I know a couple of places they would favour. Common sense would say they would want it near to where the bombing happened," he said.
However, families and local representatives are to be consulted after the study as to where the memorial should be sited.
Mr. Stephen Herron, Associated Consultant with McCauley Associates Network consultancy, is taking the lead on the feasibility study.
The Council has put forward £3,900 for the consultancy work with match funding of £1,300 for the Ely Centre.