The club initially joined and played in the North West Hockey League.
The advent of artificial turf pitches has necessitated playing home fixtures away from Portrush.
[3] In the 1957–58 Portrush tied a Test match against Banbridge and both were declared joint winners of the Keightley Cup for the Ulster Senior League champions.
In 1963–64, Portrush beat Lisnagarvey in the Ulster Final of the Irish Senior Cup, but went on to lose to Cork Church of Ireland in the all-Ireland semi-final.
In addition, the Final of the Irish Senior Cup was reached for the only time in Club history.
After a 1–1 draw in Belfast, Portrush lost after extra time to Dublin YMCA in the replay.