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 Visitor Information is the U.S. government's official web portal to all federal, state and local government web resources and services.

Due to the Federal Government shutdown, and most associated websites are unavailable. This site will remain accessible during the federal government shutdown; however, information on the site may not be up to date and we may not be able to respond to inquiries until appropriations are enacted.

NOTICE! You have reached NDBC's backup site. Most likely there is scheduled network maintenance or a temporary network problem preventing access to the main site. The backup site does not have 100% of the main site's data. Please pay attention to times of observations. Also, some links will be broken if the main web site is not available.

IOOSŪ Data Assembly Center


The Integrated Ocean Observing System (IOOS®) is a system of systems that routinely and continuously provides quality controlled ocean data and information. More information about the U.S. IOOS® can be found at the IOOS® web site. NDBC functions as the U.S. IOOS® Data Assembly Center (DAC).

As the IOOS® DAC, NDBC collects data from regional ocean observing systems, quality controls the data, and distributes it via the Global Telecommunications System in realtime. NDBC also makes the quality controlled data available on their web site and via netCDF files on its DODS server.

NDBC applies automated quality control algorithms before releasing the data in realtime and also performs additional quality assessments on daily and monthly views of the data. More information about NDBC quality control is available at QUALITY.