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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Oz Monitorly Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
The 28-day weather forecast for Perth, as indicated by the live forecast above, shows a gradual warming trend with mostly dry conditions typical of late summer. Daytime temperatures are expected to peak in the low-to-mid thirties during the first fortnight before easing slightly.
What does the extended forecast show for Perth?
The 28-day outlook combines data from the Bureau of Meteorology’s bom 14 day forecast perth, the perth 21 day forecast bom, and the perth weather 28 day forecast accuweather. A pattern of clear mornings, light easterly winds, and afternoon sea breezes dominates. The weather perth 21 days from now is expected to remain warm, with the 28 day weather forecast perth tomorrow indicating only a slight chance of isolated showers near the end of the period. The 28 day weather forecast perth met office outputs align with this broad trend.
How accurate is a month-ahead outlook?
Forecast confidence decreases beyond 7–10 days. The 28-day product is best used as a trend guide rather than precise daily predictions. The Bureau of Meteorology’s official forecast covers 7 days; extended products like the 28 day weather forecast perth met office rely on ensemble models. For Perth, the perth weather 28 day forecast 14 days out often accurately captures broad temperature shifts, but always check the Perth Weather page for short-term updates.
Can I rely on a 28-day forecast for planning a trip to Perth?
The 28-day forecast gives a useful trend – expect warm, mostly dry conditions – but always check the 7-day BOM forecast a few days before travel for precise timing of any showers or heat changes.
How does the BOM 14-day forecast differ from the 28-day outlook?
The BOM’s official 14-day forecast is updated more frequently and has higher confidence for the first week. The 28-day outlook is generated from ensemble models and focuses on longer-range patterns.
Where can I find the most reliable 28-day weather forecast for Perth?
Start with the Bureau of Meteorology for official data, then cross-reference with Weatherzone or Elders Weather for alternative model interpretations of the 28-day window. Australia’s weather hub also aggregates key outlooks.