Wales will face all four Rugby Championship sides in 2016 with November Tests confirmed against Australia, Argentina and South Africa.
Warren Gatland's side, currently ranked fourth in the world, were already scheduled to play a three-Test summer series against world champions New Zealand on the back of a capped match against England at Twickenham on May 29
Wales will play Test matches against the All Blacks in Auckland, Wellington and Dunedin from June 11-25 as well as a tour match against the Chiefs in Hamilton on June 14.
Autumn matches have now been arranged against World Cup runners-up Australia (November 5) and semi-finalists Argentina (November 12) and South Africa (November 26) at the Principality Stadium in Cardiff.
A fourth autumn fixture on November 19 will be confirmed at a later date.
2016 summer internationals
May 29: England v Wales (Twickenham)
June 11: New Zealand v Wales (Eden Park, Auckland)
June 14: Chiefs v Wales (FMG Stadium, Waikato)
June 18: New Zealand v Wales (Westpac Stadium, Wellington)
June 25: New Zealand v Wales (Forsyth Barr Stadium, Dunedin)
2016 autumn internationals
November 5: Wales v Australia
November 12: Wales v Argentina
November 19: Wales v TBC
November 26: Wales v South Africa
