From November through March, during Down Under's upside-down summer, Perth stays sunny and clear almost nonstop, especially at its coastal resorts in the south—Rockingham and Mandurah, among others. The city's position close to sea level and off the Indian Ocean in southwestern Australia gives it a sunny clime that's cooler and drier than much of the rest of western Australia. It's customary for cooling breezes to blow through town in the afternoons.
Not surprisingly, November through March also tends to be high season for competitive sailboat racing. If the city is hosting a racing cup competition on a particular weekend, hotel rates will soar, so be sure to plan your travel dates wisely. Another "no vacancy" period to watch out for is during the few weeks after Christmas, Boxing Day (December 26), and New Year's Day, a time span when most Aussies take their summer vacations. This vacation season wraps up on Australia Day (January 26) with Skyworks, arguably the city's most popular outdoor event, in which a laser show and fireworks display is launched from multiple points across the city near the Swan River.
Autumn usually peaks in April with the fall of maple leaves in the area forests—and the arrival of homemade maple syrup in shops. That said, days remain warm enough for attending outdoor events, such as movie screenings on Sandy Beach. On the far side of the calendar, the spring month of September brings the annual Fashion Week and the month-long Perth Royal Show, an agricultural and family fair with lots of prize-winning livestock and amusement-park rides for the kids.
During the winter, which peaks in July, temperatures stay cool but agreeable, with snow having never been recorded on the ground. Rain is a fact of life, though June is usually the wettest month—so keep a brolly (umbrella) handy at all times in case of a surprise downpour.