Cape Spencer is located about 125 kilometres (78 miles) south west of the municipal seat of Maitland in the gazetted locality of Inneston.

[3] It is the most south westerly point of the Yorke Peninsula coast and defined by Flinders as being the eastern side of the mouth of Spencer Gulf.

Access extends to the area around the Cape Spencer Lighthouse where views of both the adjoining coastline and nearby islands are available and the presence of interpretative signage provides information about the locality’s maritime history.

[7] The cliff line which includes Cape Spencer consists of base strata of both Gleesons Landing Granite and Tourneforte Metadolerite with an overlay of a Bridgewater Formation calcarenite rock.

[12] As of 2012, the waters surrounding its shores are within the boundaries of a habitat protection zone within the Southern Spencer Gulf Marine Park.