Skip Navigation Links 
NOAA logo - Click to go to the NOAA homepage National Weather Service   NWS logo - Click to go to the NWS homepage
Environmental Modeling Center
Local forecast by
"City, St" or
Zip Code


Marine Modeling and Analysis Branch Logo Click here to go to the MMAB home page

NWW3 Data Access

Home Product
Model Data

Model data from the latest NOAA WAVEWATCH III® runs is available in GRIB (GRIdded Binary) format on the Marine Modeling and Analyses Branch FTP server, the NCEP NOMADS GDS/DODS data server, and the NCEP Central Operations Production FTP server, at the following URLs:

  • Current Data (WAVEWATCH III® multigrid latest version)
    1. FTPPRD (NCO Production FTP Server, today and three days prior.)
    2. MMAB FTP (Marine Branch FTP server, last six runs)
    3. NOMADS (GDS/DODS) (present + 1 week archive)

  • Current Data (WAVEWATCH III® version 2.22 grids)
    1. MMAB FTP (Marine Branch FTP server, last seven runs)

  • Current Data (WAVEWATCH III® ensemble)
    1. MMAB FTP (Marine Branch FTP server, today and three days prior)

  • Archived Data (WAVEWATCH III® version 2.22 Hindcast reanalysis)
    1. MMAB FTP (Marine Branch FTP server, Aug 1999 through Dec 2014)

Notes and Information on Using WAVEWATCH III® Model Data


The operational data file format is GRiB (GRIdded Binary). Additional information on the use of GRiB at NCEP is available here.

To work with WAVEWATCH III® GRiB, any standard tools which read GRiB will work. One such tool is the freely available wgrib2 utility. The wgrib2 home page and software is here.

For analyzing the model data in MATLAB® we recommend the NCTOOLBOX for MATLAB. NCTOOLBOX can read NetCDF, OPeNDAP, HDF5, GRIB, GRIB2, HDF4 and many (15+) other file formats. The complete list of formats is available here.

EMC/MMAB Information Topics:
All Products, About Us, Contact Us
NOAA/ National Weather Service
National Centers for Environmental Prediction
Environmental Modeling Center
Marine Modeling and Analysis Branch
5830 University Research Court
College Park, MD 20740
About Us
Career Opportunities
Privacy Policy
Page last modified: Wednesday, 07-Oct-2015 15:03:45 UTC