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Where do I get NOAA tides and currents data?

Tide and current data is available from NOAA's Center for Operational Oceanographic Products and Services website

Current meter in ocean.

The two main components of currents are speed and direction. To measure currents, buoys are equipped with Global Positioning System technology or satellite communications that relay data and information.

The Center for Operational Oceanographic Products and Services (CO-OPS) and its predecessors have gathered oceanographic data along our nation's coasts for over 200 years to protect life, property, and the environment. Serving both the public and other government agencies, CO-OPS is the authoritative source for accurate, reliable, and timely water-level and current measurements that support safe and efficient maritime commerce, sound coastal management, and recreation.

1. Tides

  • High Tide Bulletin. Seasonal bulletins inform you when you may experience higher than normal high tides around the nation.
  • 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.
  • Real-Time Tide Data. Access current water levels from approximately 200 active water level stations.
  • 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.
  • 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.
  • 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.


2. Currents

  • 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.


3. 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.


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Did you know?

Tides are really big waves that move through the ocean in response to the forces exerted by the Moon and the Sun. Tides involve water moving up and down. Currents involve the movement of water back and forth, driven by factors such as tides, wind, the shape of the land, and even water temperature. Learn more

Last updated: 08/03/21
Author: NOAA
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