IODE (Popularity: )
http://www.iode.org Intergovernmental Oceanographic Data and Information Exchange.
Tides Online (Popularity: )
http://tidesonline.nos.noaa.gov/ Provides users with immediate graphical and tabular water level and meteorological data from U.S. National Ocean Service water level stations ...
National Ocean Service (Popularity: )
http://www.nos.noaa.gov/ Information on environmental monitoring, coastal monitoring and assessment, water quality, biodiversity, aeronautical chargting and cartography, nautical charting and cartography, national ...
PO.DAAC (Popularity: )
http://podaac.jpl.nasa.gov/ The NASA JPL Physical Oceanography Data Center. Active data archive from satellite remote sensing; MODIS, LANDSAT, Jason, TOPEX/POSEIDON.