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

Dataset Size Last Modified
     Folder  wlevel   --
         Folder  46050/   --
         Folder  dpia1/   --
         Folder  gdil1/   --
         Folder  lkwf1/   --
         Folder  lonf1/   --
         Folder  ptat2/   --
         Folder  sauf1/   --
         Folder  smkf1/   --
         Folder  spgf1/   --
         Folder  venf1/   --

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