The name "Perth" is used to describe the CBD (Central Business District) and a rather large area of suburbia. The CBD in itself is located approx 11kms inland from the Indian Ocean on the Swan River.

Summer in Perth is typically hot and dry, with the possibility of a sea breeze from the Indian Ocean, known locally as the "Fremantle Doctor" due to its cooling properties. Whilst rain is unusual in the summer months,  thunderstorms, particularly to the north and east of Perth do regularly occur, but these are usually brief and pass through fairly quickly. Summer in Perth is one of long, hot sunny days, with sun rise around 5.00am in Dec and sunset around 7.30pm.  Count on approximately 14 hours of daylight during the summer months December  to February. January is the perfect time to hit the beaches for a variety of activities including skiing, parasailing, fishing, swimming or just catching rays on the grassy banks at a number of the metropolitan beaches. February can bring extreme heat (40C+) and high humidity. UV is extreme - sometimes as high as 14 or 15 so sunscreen, sunglasses and endeavouring to minimise time in the sun during peak times of 10.00 - 4.00pm is strongly recommended.

Winter is generally cool, and is also the rainy season for Western Australia, with periods of heavy showers, thunderstorms and gale force winds. While Perth does not get a deep chill it can be somewhat cold, especially at night. It is erroneous to believe that it does not get cold in Perth, as minima around 1 or 2 degrees celsius are quite common over winter through to late August.The wind chill factor can make Perth a very cold place, catching visitors by surprise.

Spring and autumn are generally mild, although March and April in recent times have been hot. For those who do not like the heat, April and September/October are probably the best times to visit. The weather is still warm enough for sailing and some water sports in autumn, but with a less intense sun that that of summer. On average, you are likely to experience more rain than in the summer but less than in the winter. It should not be enough to prevent outdoor activities.

Bureau of Meteorology - Perth Weather

Western Australia Forecasts