Apple updated watchOS 7 on Monday with a fix for battery drain issues found in the original version.
Apple Watch owners can download the updates for watchOS by Watch app on their connected iPhone, selecting the My Watch tab then General, and then Software Update. Once selected, the update will automatically download and then install to the Apple Watch overnight, so long as it is placed on charge and is within Wi-Fi range of the host iPhone.
The update version is watchOS 7.0.2 (18R402) and contains a bug fix related to battery life issues. There are no other known changes in the update.