Tide Guide supports modern watchOS complication families instead of a fixed list of watch faces. It works with circular, corner, and rectangular placements. watchOS will show the Tide Guide options that fit the face and complication slot you are editing.
Depending on the placement, you can add tide charts, tide height and progress, upcoming tides, wind, swell, currents, water temperature, or Sun and Moon information to your watch face. Available data varies by station and provider.
To add a complication, edit your watch face, select a compatible complication slot, and choose Tide Guide. Complications require Tide Guide Pro. If Tide Guide is not listed, make sure the Watch app is installed, open it once, and confirm that Pro is active.