Home Postcode finder SA Germein Bay Germein Bay postcode SA Germein Bay is a locality in South Australia covered by postcode 5495. Postcode 5495 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Germein Bay business listing Be the first listing in Germein Bay Common questionsWhat is the postcode for Germein Bay?Germein Bay, SA has the postcode 5495.What state is Germein Bay in?Germein Bay is in South Australia (SA).Does postcode 5495 cover more than one suburb?Yes. Postcode 5495 covers 6 localities, so the postcode alone does not identify Germein Bay. Browse other postcodes in South Australia, or widen the search to every Australian postcode.