NDBC THREDDS Server Catalog https://dods.ndbc.noaa.gov/thredds/catalog/data/swden/51209/catalog.html

Dataset Size Last Modified
     Folder  51209   --
         51209w9999.nc 71.68 Mbytes 2023-10-27T11:00:00Z

National Data Buoy Center THREDDS Server at National Data Buoy Center see Info
THREDDS Data Server [Version 4.6.14 - 2019-07-23T11:04:31-0600] Documentation