But he has made only three first-team appearances for Spurs this season.
"Hopefully I can get a couple of games and help Middlesbrough start moving up the table," Naughton told Boro's official website.
"I had a pretty good season in the Championship with Sheffield United last season so hopefully I can carry that on now with Middlesbrough.
Naughton will be a great loan signing Dos Santos is a God "The lads have already made me feel very welcome here and all I really want to do now is play football."
Naughton played at right-back and left-back for the Blades and can also operate in midfield.