In 1986 the club purchased land in the sand dunes known as 'Thistly Hollow' which allowed seven new stunning holes to be built in these towering dunes and in natural links land, these holes were designed by club member Des Giffin.

Most recently it has co-hosted The Amateur Championship in 2014 along with Royal Portrush which was won by Bradley Neil of Scotland.

[3] It also co-hosted the Boys Amateur Championship in 2018 alongside Royal Portrush which was won by Conor Gough of England.

[5] In 2017, Portstewart hosted the Dubai Duty Free Irish Open, from 6–9 July for the first time in the club's history.

[6] The young Spaniard Jon Rahm took the title and shot an Irish Open record score of 24 under par for 4 days.