This service offers nowcasts and short-term forecasts for select regions critical ports, harbors, estuaries, Great Lakes, and coastal waters. Tidal Current Predictions. Storm QuickLook. Predictions may be generated up to two years in advance.
Seasonal bulletins inform you when you may experience higher than normal high tides around the nation.
Access high resolution, one-minute water level sample data used to support national tsunami warning and mitigation efforts. 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.
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.
Last updated: Obtain tidal current predictions for more than 2700 tidal current stations nationwide. Access near real-time oceanographic and meteorological observations at locations affected by a tropical cyclone. For a given NOAA tide station, retrieve historic tide data from the earliest to the most recent dates for which data is available.
Tide Predictions. The two main components of currents are speed and direction. Tides Online. Sea Levels. 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.
View real-time current data collected by NOAA current meters around the nation. Tidal Datums. Operational Forecast System. View a global map depicting regional trends in sea level, with arrows representing the direction and magnitude of change.
Learn more. 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. Access NOAA's tidal datums. Scientists use datums to define "normal" water levels as a starting point from which all measurements are made. To measure currents, buoys are equipped with Global Positioning System technology or satellite communications that relay data and information.
The numbers that appear on a nautical chart represent water depths measured relative to such a datum. Search Our Facts. Real-Time Tide Data.