[Zoepfli]

Funny, it is for me: any wikipedia page redirects to its https counterpart.

E.g. http://en.wikipedia.org/wiki/Hacker_News redirects to https://en.wikipedia.org/wiki/Hacker_News .

[makomk]

Do you have a user account at Wikipedia by any chance? They've been redirecting logged-in users to the SSL version for a while, and under some circumstances it also seems to redirect users who have been logged in but aren't right now.

[Zoepfli]

I do indeed have a WP account. It redirects as well when I'm logged out.

[StavrosK]

Are you using the HTTPS Everywhere extension, perhaps?

[Zoepfli]

No I'm not. I'd love to, but there is none for Safari as far as I'm aware of.