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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Aussie Briefly Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
The extended weather forecast above gives a general outlook for the coming weeks, covering typical conditions and broad trends rather than day-by-day certainty. It is most useful for planning holidays, events or outdoor work, but remember that accuracy drops sharply beyond seven days, so always check the live forecast above for updates.
How reliable is a 28-day extended forecast?
Long-range forecasts, including the 28-day outlook shown above, are based on climate models and historical patterns. They indicate the likely direction of weather – wetter or drier, cooler or warmer – but individual day predictions become unreliable beyond about a week. The Bureau of Meteorology updates these outlooks daily, so the live forecast above is your best guide for the current view.
What do the symbols and terms mean?
The extended forecast typically uses icons for sunny, cloudy, rain or storm, with probability of precipitation and temperature ranges. Terms like “possible shower” mean a 30–50% chance, while “rain” indicates higher confidence. For specific planning, especially in Melbourne or Sydney, the Melbourne weather and Sydney weather pages offer a 14-day extended forecast with more detail.
How accurate is a 30-day weather forecast?
The accuracy of any 30-day forecast is limited – it can indicate broad patterns like a warmer or wetter period, but not precise daily rain or temperatures. Check the live forecast above for weekly trends, then use a 3-day or 7-day forecast for finer detail.
What is the difference between a 14-day and a 28-day forecast?
A 14-day extended forecast is usually a blend of model output and human interpretation, offering day-by-day estimates. A 28-day or 30-day forecast focuses on averages and anomalies – it tells you if a month is likely to be wetter or hotter than normal, not what next Wednesday will bring.
Where can I get a 21-day forecast for Adelaide?
The Adelaide weather page includes a 21-day outlook from the Bureau of Meteorology. You can also combine the live forecast above with the 7-day detail for a more complete picture of the fortnight ahead.