Displaying weather and tide info at a lifeboat station

I've recently aquired a pi and its all new to me. I would like to use it to display tidal and weather information in a lifeboat station on a monitor in the changing room. Any help whit what's the best way to go about it would be great.

Watch Freezing, Screen Displaying Snow

Several times a day my watch is "freezing" and the screen displays White Snow background with colored spots. Pressing the side button for 10 seconds results in the watch restarting and returning to the same screen. Pressing and holding it for more than 20 seconds the watch shuts down. If I then restart it some time later it sometimes starts ok!
I have tried resetting this back to default but this made no difference.

Is anyone else experiencing this? Any suggestions?