Home Postcode finder WA Gwelup Gwelup postcode WA Gwelup is a locality in Western Australia covered by postcode 6018. Postcode 6018 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Gwelup business listing More business listings in Gwelup Businesses in GwelupLake Gwelup Primary School59 Porter St · 08 94462674Xterminate5 Lagonda Drive, Gwelup WA, Australia · 1300 455 163 Common questionsWhat is the postcode for Gwelup?Gwelup, WA has the postcode 6018.What state is Gwelup in?Gwelup is in Western Australia (WA).Does postcode 6018 cover more than one suburb?Yes. Postcode 6018 covers 6 localities, so the postcode alone does not identify Gwelup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.