The Tide Data page provides access to tide (water level) data for the station indicated in the upper left corner of the page.

If the station is currently active, a plot showing tide data for yesterday and today will appear when the page is opened. The plot shows predicted water level in blue, observed water level in red, and the difference between the observed and predicted water levels in green.

Use the form to change the dates. Click the View Plot button to refresh the plot. Click the Reset button to reset all the options to their default values.

Enter dates in the format yyyymmdd. For example, January 23, 2005 should be entered as "20050123". The default dates are yesterday and today. Any date range can be entered, but plots will take longer to load if a large date range is chosen.

A tidal datum is a standard elevation used as a reference to measure water levels. MLLW, or Mean Lower Low Water, is the default datum..

The data is displayed in feet, and in local time. The default unit for water level is feet. The default time zone is local.