Tides Online is a continually updated database of tidal information maintained by NOAA's Center for Operational Oceanographic Products and Services. The site contains data from stations from every coastal state in the US including the Great Lakes. The main page shows which stations are currently under a "storm surge" and contains the links to the individual station data -- of which the easiest to...

From the University of South Carolina's Wethey Lab Homepage, the tide and current predictor contains up-to-date basic predictions and a format for obtaining customized predictions. Access to data is organized by location. Location choices include US Upper East Coast (Maine through Virginia), US Lower East Coast (North Carolina through Florida Keys), US Gulf Coast sites (East to West), US West...