The commemoration is to take place in silence and will lead mourners on a short procession around the perimeter of the block's charred husk.
Organised by Grenfell United, a collective created for those who fled the inferno on June 14, the walk will culminate at nearby St Clement's Church in the early afternoon.
It rounds off a fraught few days for the west London neighbourhood, characterised by both a string of emotional vigils and a heated confrontation between residents and police at a meeting .
On Thursday, the human cost of the tragedy continued to stack up, as two more of at least 80 people who are believed to have perished in the June 14 blaze were officially named.
The family of Yahya Hashim, 13, paid tribute to the "kind, polite, loving, generous, thankful and pure-hearted" boy who is believed to have died with his parents Nura Jamal and Hashim Kidir.
Relatives of 82-year-old grandfather Ali Jafari said he "was loved and will be greatly missed by his family and the wider community".
Meanwhile, the political tremors of the disaster continued to reverberate, as the government was urged to end its "fatal obsession with deregulation".
Safety bodies were among more than 1,000 signatories to an open letter calling on Theresa May to rethink the drive to cut so-called red tape under the Conservatives.
A debate in the House of Lords, led by Labour peer Baroness Andrews, culminated in an agreement that safety industry representatives should meet ministers.
She told peers at Westminster: "This fatal obsession with deregulation in all forms across Whitehall has been pursued with no regards for consequences other than the benefits to business."
Two more NHS trusts in England and two schools were added to a growing list of buildings that have failed cladding fire safety checks as part of a safety operation launched in the aftermath of the deadly fire.
The National Fire Chiefs' Council said the fire risks posed by buildings with aluminium composite material (ACM) cladding, which is not of limited combustibility, can be reduced by other actions and further checks.
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