Apple doesn't use public code names for watchOS the way the company does for the currently California-landmark dubbed macOS Sierra. It does use internal code names, though. The Apple Watch itself was code names Gizmo, but for watchOS, it's all based on beaches.

  • 2.0: Bondi
  • 2.2: Coral
  • 3.0: Daytona
  • 3.1: Blowfish
  • 3.2: Electric

Apple's code names