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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Coast Pulse Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
The live forecast above shows the current temperature and conditions for Thornlie. This suburb in Perth’s southeast enjoys a Mediterranean climate, with hot, dry summers and mild, wet winters. For comfortable conditions, plan visits around the shoulder seasons of spring and autumn.
What kind of weather does Thornlie experience year-round?
Thornlie, like most of the Perth region, has distinct seasons. Summer (December to February) brings dry heat with average highs around 30–32°C, often cooled by afternoon sea breezes known locally as the “Fremantle Doctor”. Winters (June to August) are mild and damp, with average lows around 8°C and the majority of the annual rainfall occurring between May and September.
When should travellers plan a visit to Thornlie?
For the most reliable weather, plan your trip during the shoulder seasons. Spring (September to November) and autumn (March to May) offer warm, sunny days with low humidity and minimal rainfall. These months are ideal for exploring local parks and the Canning River. To stay updated on conditions across the country, visit the Australia weather hub.
Does Thornlie experience bushfire weather?
Yes, the hot, dry summer months create a defined bushfire season in Thornlie, as in much of the Perth region. It is wise to monitor the live forecast and local fire danger ratings during your visit.
How does Thornlie’s weather compare to the Perth CBD?
Thornlie sits further inland, so it can be a degree or two warmer on summer afternoons and slightly cooler on winter mornings compared to the coastal Perth CBD. This makes for warmer summer evenings but cooler starts to winter days.
What should I pack for a trip to Thornlie?
Pack light clothing for summer, but always include a jacket for the evening sea breezes. In winter, bring a rain jacket and layers for mild, damp days. Sun protection is essential year-round due to high UV levels.