There is no credible or confirmed information that Kate Winslet suffered from hypothermia during the filming of Avatar 2. While the production of Avatar: The Way of Water involved extensive underwater performance capture and filming in large water tanks, no reports or official statements indicate that Winslet experienced hypothermia or any related medical condition during the shoot.
The making of Avatar 2, directed by James Cameron, was documented in a two-part behind-the-scenes series titled “Fire and Water: Making the Avatar Films,” which includes interviews and footage with cast members including Kate Winslet. This documentary highlights the challenges of underwater filming and the advanced technology used, such as a massive 680,000-gallon water tank and free diving training for the actors. However, it does not mention any incidents of hypothermia or serious health issues for Winslet or other cast members during production[1][2][3].
Kate Winslet’s involvement in the Avatar sequels was notable because she trained extensively for underwater scenes, demonstrating significant physical endurance and skill. The production team and cast underwent rigorous preparation to handle the demanding underwater performance capture process, but the available information focuses on their professionalism and the technical achievements rather than any health emergencies[1][2].
In summary, while filming Avatar 2 involved physically demanding underwater work in cold water environments, there is no evidence or report that Kate Winslet got hypothermia during the filming. The behind-the-scenes materials and interviews celebrate the cast’s dedication and the innovative filmmaking techniques without mentioning such an incident.

