He competed for Ireland at the FIS Nordic World Ski Championships 2017 in Lahti, Finland, one of five Irish participants in the championships. In his world championship début in the Men's sprint on 23 February 2017, Westgård ranked as number 77, while at the Men's 30 kilometre pursuit on 25 February 2017, he came in last of the participating contestants. He achieved his best result of the championship in the Men's 15 kilometre classical on 1 March 2017, ranking as 49th. Westgård brought a three-man team to the FIS Nordic World Ski Championships 2017, including his father as a helper and Irish cross-country skier Dominic McAleenan as team manager.