Install Google Analytics and check there. I'm seeing the same thing, most of that extra traffic is search engines/bots. Google Analytics ignores them and gets you only meat user data.
Internet Slow Down Day
This is targeted for those who are stateside mostly, but this could end up affecting everyone.
I saw the campaign mentioned on Reddit, and it seems like it would be pretty simple to add the script into a widget to display on your NodeBB install if you were interested in doing something along those lines.
Here's the campaign sign up if anyone is interested and has a lot of US traffic.