Today's weather forecast for Sydney by the hour. Get the latest weather forecast for Sydney, Australia. View live conditions, a 7-day forecast, hourly updates, air quality index, and more. Get the latest Sydney weather forecast with live Bureau of Meteorology data. Current conditions, 7-day forecast, and detailed Sydney weather information. Updated daily. Know what's coming with AccuWeather's extended daily forecasts for Sydney, New South Wales, Australia . Up to 90 days of daily highs, lows, and precipitation chances.