NOAA provides forecast guidance of oceanographic information to help mariners safely navigate their local waters. This national network of hydrodynamic models provides users with operational nowcast and forecast guidance (out to 48 hours) on parameters such as water levels, water temperature, salinity, and currents. These forecast systems are implemented in critical ports, harbors, estuaries, Great Lakes and coastal waters of the United States, and form a national backbone of real-time data, tidal predictions, data management and operational modeling.

• Operational Forecast Regions:

  
  Select a Forecast Chesapeake Bay Columbia River Cook Inlet Delaware Bay Gulf of Maine Lake Erie Lake Michigan and Huron Lake Ontario Lake Superior New York/New Jersey Northern Gulf of Mexico San Francisco Bay St. Johns River Tampa Bay West Coast

• Marine Channel Forecast

  
  Select a Marine Channels Forecast Mobile Bay Tampa Bay
  A product designed to aid local pilots by providing them with meteorological and oceanographic forecasts along the marine channels.