The Overwatch Season 25 end date hasn't been officially confirmed by Blizzard, but the seasons tend to run along a similar schedule, so we can make educated guesses about when the season will end. Here's when Overwatch Competitive Season 25 is expected to end, based on previous season lengths.
Overwatch Season 25 End Date: When Does it End?
Although it's impossible to predict the exact date without Blizzard's input, Overwatch Season 25 is expected to end on or around Jan. 7, 2021. Seasons last around two months each, and Season 25 began Nov. 5, pointing to an end roughly two months later.
Typically, Blizzard will announce the approaching season's end a few days before the season itself ends. A countdown appears in-game to give players a heads up before the season closes, allowing them a chance to get their last few games in before their ranks are locked in for the season.