Daniel Lee, Software & Data Format Engineer at EUMETSAT guides you through a variety of free and open software, for you to visualize NetCDF format files.

You can find the links mention in this video below:

CMEMS

CODA

CAMS

Example notebook

GDAL

Jupyter

Scipy stack, including matplotlib and numpy

Info on netCDF

netCDF tools download

QGIS

Xarray

Scitools

CF Conventions

ACDD

Natural Earth