Barricades will block of Main Street and be designated as a no parking zone for The Main Street Market.
It will be closed from First Street South to Second Street South on Saturday, July 6, from 8 a.m. to 10 p.m.
This is to allow time for vendors, shops and food trucks to set up before the market begins at 3 p.m.
For businesses impacted by the closure, there is limited free parking available near the post office in the Park Street parking lot. There is also four-hour free parking along the greenbelt of the Harbourfront.
The market will run until 9 p.m. and the street will re-open an hour later.