Before you plan around it
The market is a Friday, and only a Friday.
There is a daily market in the same building, and it is not the same thing. If you are in Goa Saturday to Thursday, this walk cannot happen — we would rather say so than sell you the small version.
It runs every Friday of the year, including through the monsoon, when it moves further under cover and gets better. It opens at 06:30 and peaks from 08:00 to 10:00; by noon the produce sellers have gone.