There have been no official announcements from Netflix as to when The Circle Season 2 will premiere or even enter production, but a casting listing on Backstage detailing the reality competition’s casting does have a section containing the tentative shooting dates for the upcoming season.
A similar casting post ahead of The Circle Season 1 from back in 2019 called for a three-to-four-week shoot starting in August of that year.
That season premiered on Netflix in January 2020, so it’s entirely possible that the second season returns in the first few months of 2021.
According to the site, production was tentatively scheduled to get underway in late October or early November 2020 and would take up to six weeks to complete.