Northeastern Regional Association of Coastal Ocean Observing Systems (NERACOOS) provides real-time ocean and coastal information gathered from instruments attached to buoys floating offshore (see diagram at right). The NERACOOS home page ( provides access to data collected at these buoys. The easiest way to find data for your area is to use this interactive map: ( The map (example below) displays hourly observations from buoys and other places collecting data (monitoring stations) in the Northeast region.

Here’s how you can use this map:

  1. You’ll see many circles, squares, and triangles marked on the map. Each represents a data-collection site, and you’ll notice that they are both near the coast and further out at sea. The colors indicate the agency that owns or maintains the stations. Most are owned and maintained by the U.S. government, others belong to universities, and some are contributed by the Canadian government.
  2. Click a station icon (circles and squares) to see a list of the latest observations collected at that buoy.
  3. From that list (labeled with the station name at the top), click on a variable name (air temperature, wind speed, e.g.), and a small graph at the bottom of that list will show how that variable has changed over the past 12 hours.
  4. Click on a tide station icon (triangles) to see tide graphs. Here you’ll see how regularly the water height changes with the tide. Due to atmospheric or other conditions, latest tide data may not always be available.

NOTICE: These real-time data are considered provisional. Please read the definition of provisional data and their inherent limitations