Tide and current data is available from NOAA's Center for Operational Products and Services website
Tide Predictions. Generate a graphical display or a tabular listing of daily high and low tide predictions for more than 3,000 locations around the nation. Predictions may be generated up to two years in advance.
Historic Tide Data. For a given NOAA tide station, retrieve historic tide data from the earliest to the most recent dates for which data is available. For the Great Lakes region, see Great Lakes Historic Water Level Data.
Sea Levels. View a global map depicting regional trends in sea level, with arrows representing the direction and magnitude of change.
Tsunami-Capable Tide Stations. Access high resolution, one-minute water level sample data used to support national tsunami warning and mitigation efforts.
Tide Station Index. Generate a per-state list of all NOAA tide stations, including station number, name, location, installation date, and more.
Tidal Datums. Access NOAA's tidal datums. Scientists use datums to define "normal" water levels as a starting point from which all measurements are made. The numbers that appear on a nautical chart represent water depths measured relative to such a datum.
Real-Time Current Data. View real-time current data collected by NOAA current meters around the nation.
Historic Current Data. View historic current data collected by active and retired NOAA current meters around the nation.
Tidal Current Predictions. Obtain tidal current predictions for more than 2700 tidal current stations nationwide.
Other CO-OPS Products and Services
PORTS®. NOAA's Physical Oceanographic Real-Time System (PORTS®) improves the safety and efficiency of maritime commerce and coastal resource management through the integration of real-time environmental observations, forecasts and other geospatial information. PORTS® measures and disseminates observations and predictions of water levels, currents, salinity, and meteorological parameters (e.g., winds, atmospheric pressure, air and water temperatures) that mariners need to navigate safely in and around key maritime ports around the nation.
NowCOAST. NowCOAST is a web mapping portal that provides spatially referenced links to thousands of real-time coastal observations and NOAA forecasts of interest to the marine community.
Storm QuickLook. Access near real-time oceanographic and meteorological observations at locations affected by a tropical cyclone.
Operational Forecast System. This service offers nowcasts and short-term forecasts for select regions (critical ports, harbors, estuaries, Great Lakes, and coastal waters). These real-time observations and forecasts deliver present and future states of water levels, along with currents and other relevant oceanographic variables, such as salinity and temperature.
Original article: Where do I get NOAA tides and currents data?