For those of us in Canada, there's a great site that monitors water levels around the country.
CHS-Tides, Currents, and Water Levels
Being in the Great Lakes, I can easily find present, hourly, water level observations in relation to chart datum for my chosen destination.
A glance at the ocean side of things looks like they have tidal predictions and so-on as well.
Anyway, just thought I'd share.