Season 3 of The Witcher will come out next summer.

In The Witcher season three, Geralt will be back in the summer of 2023.
Even though we don't know the exact date yet, Summer 2023 isn't that far away, so we should know the exact date in the next few months. Season three just finished filming, and as has been the case since the first season of the Witcher series, shooting had to be put on hold because of Covid.
We didn't get to see a trailer or any real footage from season three of The Witcher. Henry Cavill made the announcement at Netflix's Tudum event, where we also saw some behind-the-scenes footage of Anya Chalotra and Freya Allan. About the next season, not much is known yet, but Netflix did put out a summary a few months ago.
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The synopsis says, “As monarchs, mages, and beasts of the Continent try to get her, Geralt takes Ciri of Cintra into hiding to protect his newly reunited family from those who want to destroy it.” ” Yennefer is in charge of Ciri's magical training, so she takes the two of them to the safe fortress of Aretuza. There, she hopes to learn more about the girl's undiscovered powers. Instead, they find themselves in a battlefield of political corruption, dark magic, and betrayal. They have to fight back and put everything on the line, or they could lose each other for good.”
But we'll be back on The Continent next year much sooner than summer. At the event, it was also announced when The Witcher: Blood Origin, a spinoff of the main series, would come out. This series will start on December 25 and take place 1,200 years before The Witcher. It will tell the story of what happened before The Conjunction of Spheres and how the first Witcher was made.
In Blood Origins, Michelle Yeoh plays Scian, the last member of an Elf tribe who is on a mission to get back a special blade that was stolen from her people. Sophia Brown plays Eile, a musician who used to be part of the Queen's guard, and Laurence O'Fuarain plays Fjall, a member of a warrior clan. We don't know much else about Blood Origins.