Have you run an analysis, yet the word count is much different from what you can see on the page?
Surfer counts all the content that is within the <body> part of your page. This includes any sidebars and the footer, it also includes and content hidden from the site in scripts, image alt tags and content that is marked as hidden in the CSS.
You are able to check hidden content, via the SERP Analyzer. Simply click the 'A' button on the left side of your URL. It will present to you all the text that Google can see but the user doesn’t see.