One liner
wget --recursive --page-requisites --adjust-extension --span-hosts --convert-links --restrict-file-names=windows --domains yoursite.com --no-parent yoursite.com
Explained
--recursive \ # Download the whole site. --page-requisites \ # Get all assets/elements (CSS/JS/images). --adjust-extension \ # Save files with .html on the end. --span-hosts \ # Include necessary assets from offsite as well. --convert-links \ # Update links to still work in the static version. --restrict-file-names=windows \ # Modify filenames to work in Windows as well. --domains=yoursite.com,domain2.com \ # Do not follow links outside these domains. --no-parent \ # Don't follow links outside the directory you pass in. yoursite.com/ # The URL to download