Google analytics direct traffic spike
Re: Google analytics direct traffic spike
You may be getting referral spam. Add a secondary dimension of hostname to see if it's from your site.
Adding an include filter for your own hostname is a great first line of defense.
Obviously you can ignore the sub in the screenshot example. A filter like this would exclude traffic that came from other sites/spammers. Be sure to test this in a duplicate view first and promote it to your analysis views while maintaining an unfiltered view of your data as well.