National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/marine-ocean/ersst.html

Dataset Size Last Modified
     Folder  ERSST - Extended Reconstructed Sea Surface Temperatures   --
         Folder  Aggregations   --
             ERSST - Extended Reconstructed Sea Surface Temperatures version 5 - Period of Record Aggregation   --
         Folder  File Listings   --
             Folder  ERSST - Extended Reconstructed Sea Surface Temperatures version 5/   --

NCEI THREDDS Server at NCEI see Info
Documentation