Whenever I see a suspicious looking URL I want to go to, I usually just search it up on Google's webcache and browse the site that way. But I just realized that I never really had evidence to support this kind of habit. Are web cached pages generally more safe than the original pages?
It is all down to what "cached" means... Since you mentioned Google Cache, a default cached version, caches the text and load external resources (potentially unsafe): So it is by default no more secure than accessing the webpage directly.
If you edit the cached URL however by adding
&strip=1, it will be more secure by essence, because the current cached page has been stripped of external references.
If you wish to check a URL that is suspicious, I would advice doing so on a Unix/Linux (including OS X) VM then restore a snapshot.
if using a Windows computer, I would be a bit more careful, open a private session in the browser, disable Java, Flash, Silverlight and any other plugins (but the antivirus/malware agent), then access this page or use the striped cached mode.