Home Postcode finder NSW Hmas Watson Hmas Watson postcode NSW Hmas Watson is a locality in New South Wales covered by postcode 2030. Postcode 2030 State or territory New South Wales (NSW) Region Waterloo Add a free Hmas Watson business listing Be the first listing in Hmas Watson Common questionsWhat is the postcode for Hmas Watson?Hmas Watson, NSW has the postcode 2030.What state is Hmas Watson in?Hmas Watson is in New South Wales (NSW).Does postcode 2030 cover more than one suburb?Yes. Postcode 2030 covers 5 localities, so the postcode alone does not identify Hmas Watson. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.