Can I view .bit domains without having internet through my ISP provider?
Unfortunately, no, the contents of websites themselves are not distributed by namecoin. There is something that is, though: For regular internet sites, your computer would first contact a domain name server with a query of what internet protocol (IP) address this site currently has. When using namecoin's .bit domain, all the information that usually originates at domain name servers on the internet instead comes from data distributed by the namecoin network across its clients.

So, yes, there is some data that is distributed and does exist locally if you run a namecoin client. But it will only give you some minimal metadata about the sites, not any of their content.