Geographe Bay is located in the South West of Western Australia around 220 km southwest of Perth.
The bay was named in May 1801 by French explorer Nicolas Baudin; Baudin named the bay after his ship, Le Géographe. The bay is a wide curve of coastline extending from Cape Naturaliste past the towns of Dunsborough and Busselton, ending near the city of Bunbury. The bay is protected from the rough seas of the Indian Ocean by Cape Naturaliste, which makes it a popular destination for recreational boaters. The bay is extremely shallow, limiting the entrance of large ships. To alleviate the problem the two-kilometre-long Busselton Jetty, the longest in the southern hemisphere, was built.
The Royal Australian Navy frigate HMAS Swan was sunk in the bay off the town of Dunsborough on 14 December 1997, for use as a dive wreck.
The bay attracts whale watchers, who see it as an alternative to Flinders Bay.
- Fornasiero, Jean; Monteath, Peter and West-Sooby, John. Encountering Terra Australis: the Australian voyages of Nicholas Baudin and Matthew Flinders, Kent Town, South Australia,Wakefield Press,2004. ISBN 1-86254-625-8
- Marchant, Leslie R. French Napoleonic Placenames of the South West Coast, Greenwood, WA. R.I.C. Publications, 2004. ISBN 1-74126-094-9