The NetCDF Tools User Interface (a.k.a. ToolsUI) can read and display THREDDS catalogs. You can start it from the command line.

Use the THREDDS Tab, and click on the fileOpen button to navigate to a local catalog file, or enter in the URL of a remote catalog, as below (note that this is an XML document, not an HTML page!). The catalog will be displayed in a tree widget on the left, and the selected dataset will be shown on the right:


Once you get your catalog working in a TDS, you can enter the TDS URL directly, and view the datasets with the Open buttons.