Home Postcodes by state WA 6271 Postcode 6271 6271 is the postcode for 5 localities in WA: Capel, Capel River, Forrest Beach, Peppermint Grove Beach and Stirling Estate. Localities with postcode 6271CapelWACapel RiverWAForrest BeachWAPeppermint Grove BeachWAStirling EstateWA Postcode 6271 State or territory Western Australia (WA) Localities 5 Council area Capel Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6262 · Postcode 6275