This is a Tide and Weather Watch. The tidal information only works in the USA. It requires the app named "httPebble" (iOS) or "Pebble Connect" (Android) to access tide and weather information.
The closest tide monitoring and weather stations are selected by GPS, and updated periodically.
This version (1.4, 11/21/2013) works with Pebble firmware 1.13.
1.4 Updated for Pebble firmware 1.13