I'm looking to subscribe to a print science magazine with ~weekly editions that I can read offline without risking an accidental detour on Reddit. Can anybody recommend one?
If I recall correctly Scientific American used to be like what you're asking for in that it published articles written by practicing scientists aimed at the educated general public, but I think it long ago abandoned that model.
If the only reason you don't want to be online is to avoid distractions why not install some software that lets you block access to certain web sites ?