We derive the latest constraints on various simplified models of natural SUSY with light higgsinos, stops and gluinos, using a detailed and comprehensive reinterpretation of the most recent 13 TeV ATLAS and CMS searches with $\sim 15$~fb$^{-1}$ of data. We discuss the implications of these constraints for fine-tuning of the electroweak scale. A key aspect of this work is an improved calculation of the tuning measure (including two-loop effects, a proper treatment of UV vs.~IR masses, and threshold effects), which significantly relaxes the naturalness bounds on the stop and gluino masses. Despite this, natural SUSY is under pressure from the LHC.