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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Australia Pulse 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 live forecast above shows Kwinana under a moderate westerly airflow, with temperatures near the seasonal average for late summer. This pattern is typical: afternoon sea breezes from Cockburn Sound often drop the mercury by several degrees, providing coastal relief.
What drives Kwinana’s daily weather?
The dominant influence is the sea breeze from Cockburn Sound, which arrives mid-afternoon and cools the suburb by 5–8°C. Combined with the subtropical ridge, this creates a predictable rhythm of warm mornings, a peak around 2pm, then a rapid drop as the onshore flow strengthens. Nearby Perth weather follows a similar pattern, but Kwinana’s coastal position means the breeze arrives earlier and temperatures are often 2–3°C lower than the city centre.
What can the 14-day forecast tell us?
The extended outlook from the Bureau of Meteorology shows a high-pressure system lingering over the Bight, bringing stable conditions for the next week. The live forecast above aligns with this trend, though local variations — such as afternoon thunderstorm potential — are best tracked via the kwinana weather radar. For a closer look at the coming week, check the kwinana weather 14 day predictions available on the live panel.
When is the best time to visit Kwinana Beach?
Autumn (March–May) offers the most comfortable conditions: warm days (mid-20s), low humidity, and gentle sea breezes. Summer can be hot (30–40°C) but the beach provides relief; winter is mild but wetter. Check the weather in kwinana beach 10 days before planning your trip.
How reliable is the Kwinana weather radar?
The BOM radar at Serpentine provides real-time precipitation data with a 128 km range covering Kwinana. It is highly accurate for tracking showers and thunderstorms, though coastal ground clutter can cause minor false echoes. For kwinana weather hourly updates, combine radar with the live forecast above.
How does Kwinana compare to neighbouring Rockingham?
Rockingham weather is very similar — both share the same sea‑breeze regime and proximity to Cockburn Sound. However, Kwinana sits slightly further inland, so temperatures can be 1–2°C warmer before the breeze arrives. For a direct comparison, view rockingham weather alongside the live forecast above.
Sources
- Bureau of Meteorology – Perth forecast (includes Kwinana)
- Weatherzone – Kwinana weather
- Elders Weather – Kwinana
For broader coverage, visit the Australia Pulse weather hub or the Perth weather page for regional context. Kwinana weather bom observations are also available directly from the Bureau.