The opening game of Wales’ summer series is a double-header against the Barbarians at Allianz Stadium in Twickenham.
The men’s match will kick off at 14:00 BST before the women’s game follows at 17:00 in games that are expected to be uncapped.
It is considered an away game for Wales so Barbarians choose the venue as the “home side”, while the Principality Stadium is hosting non-related rugby events over the summer with Metallica playing a rock concert in Cardiff on Sunday, 28 June.
Wales will then play three away games in the summer campaign against Fiji, Argentina and South Africa in World Rugby’s new biennial competition.
Wales open their Nations Championship campaign against Fiji at Cardiff City Stadium on Saturday, 4 July.
It is an away game for Wales with Fiji playing their home matches at venues outside their country.
It will be the first time the Wales men’s national side play an international at the home of Cardiff City football club.
Wales then travel to play Argentina in San Juan on Saturday, 11 July before making the trip to play the Springboks in Durban seven days later.
Tandy’s side will host Japan, New Zealand and Australia at Principality Stadium in November in the second half of the Nations Championship.
Saturday, 27 June
Barbarians v Wales, Allianz Stadium, Twickenham (14:00 BST)
Nations Championship
Saturday, 4 July
Fiji v Wales, Cardiff City Stadium, (14:10 BST)
Saturday, 11 July
Argentina v Wales, Estadio San Juan del Bicentenario, (20:10 BST)
Saturday, 18 July
South Africa v Wales, Hollywoodbets Kings Park, Durban (16:40 BST)
