Despite Wales going into the match as favourites, Howley said that Scotland will fancy their chances in front of their home crowd.
"Scotland have been really impressive, having to defend without much possession," Sky Sports News quotes Howley as saying. They have [also] played some good rugby.
"When you look at their individuals - their back three against our back three - it is going to be some game in terms of counter-attacking and ball in hand.
"[Forwards coach] Dean Ryan has given them a steely edge, and the breakdown area will be key. They are at home and will fancy their chances."
Wales are second in the Six Nations table, with two games to play.