The riding is underrated and improving all the time. There is nothing in the city as it is flat and built on sand. A car is necessary if you are going to be working in the CBD (the city sprawls – a lot).
The Perth hills are 25km to the east of the city are an absolute gem. Approx 100km of primo singletrack. There are access issues but this is improving all the time. Some of the purpose built trails that are under construction are superb.
Yes it is too hot to ride and the trails get a bit loose for a few weeks in the summer, but it is never too cold, wet, muddy or snowy. Winter here is fantastic.
Click here for some WA freeride
And this is what I did last weekend.
[video]http://www.vimeo.com/28049833[/video]
Yes it is expensive for visitors due to the strength of the AUD and it is parochial, but Aussies are still more pleasant and friendly than most. Not that it matters as the place is full of poms.
Other than riding, the beaches aren’t too shabby, the wind surfing, kite boarding and sailing are world class; as is the surf down south (not in Perth though). The beer is shlt.