After the World Cup, North continued in his place as a regular starter for Wales. He scored a late try as Wales beat Ireland 23–21 in the opening game of the 2012 Six Nations, and he went on to start all four of the remaining matches as Wales claimed their first Grand Slam since 2008. He then played in every minute of the 2013 Six Nations, scoring the only try of the game as Wales won their first match away to France since 2005. Defeat to Ireland on the opening weekend meant Wales needed a seven-point margin of victory against England in their final match to claim the title; although North failed to score, they ended up winning 30–3 and retained the title for the first time since 1979.