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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Down Under Brief Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Postans, on the Swan Coastal Plain north-east of Perth’s CBD, is facing a warm and mostly dry day as the live forecast above shows. Light easterly winds will shift south-westerly during the afternoon, keeping humidity low.
What will the temperature feel like in Postans today?
The live forecast above gives the current temperature and wind. With Postans’s inland position a few kilometres east of the coast, afternoon sea breezes often arrive later than in beachside suburbs, so peak heat may hold into the early evening before cooling.
How does Postans’s location affect its weather?
Sitting on the flat Swan Coastal Plain near the Ellen Brook floodplain, Postans is less exposed to the moderating effect of the Indian Ocean than suburbs closer to Fremantle. Summer days can push several degrees higher than in coastal Perth, while winter nights are often cooler as clear skies allow rapid heat loss.
Is Postans prone to thunderstorms?
Yes, especially in spring and early summer when easterly winds collide with sea-breeze moisture. Storms can develop quickly over the inland plains north of the Swan River.
How does the Ellen Brook affect local weather?
The brook’s floodplain can trap cool air on winter nights, leading to fog in Postans and nearby suburbs. It also provides a green corridor that slightly increases humidity during summer afternoons.
When is the best time to visit Postans for good weather?
Late autumn (April–May) offers mild days around 24–27°C, light winds and low humidity. Crowds are thin and the bushland along Gnangara Road is pleasant for walking.
For more on the region, see our Perth Weather page or check Australia’s national weather hub. If severe storms are forecast, refer to our Severe Weather Warning guide.