With weather this good, it should really come as no surprise that Perth is an active, outdoorsy kinda town: locals are up and about early in the morning, jogging, swimming, surfing, riding bikes and paddling SUPs across the broad Swan River estuary.
Perth can get a bit hilly, but cycling is still an excellent way to explore the city. Kings Park has some good bike tracks and there are cycling routes along the Swan River, running all the way to Fremantle, and a Coastal Trail tracking north to Sorrento. For route maps, see www.transport.wa.gov.au/cycling or call into a bike shop. For bike hire, try Spinway WA, the city's bike-kiosk system, or Cycle Centre for longer rentals.
The lucrative whale-watching season off the Perth beaches runs from mid-September to early December, when 30,000 cetaceans – mostly blue and humpback whales – ride the 'Humpback Highway' up the coast. Tour operators offer either a refund or a repeat trip in the unlikely event that whales aren't spotted. Tour boats are fitted with underwater hydrophones, so you can also listen to the whales singing. Be aware, however, that research suggests that human interaction with sea mammals potentially alters their behavioural and breeding patterns.