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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Southern Monitor Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Check the live forecast above for the latest conditions in Hornsby Heights. The suburb sits on a ridge in Sydney’s upper north shore, so it often runs a few degrees cooler and gets more rain than the valley below. Plan outdoor activities around the morning window if possible.
What makes Hornsby Heights weather different from nearby suburbs?
Elevation of roughly 190 metres gives Hornsby Heights a distinct microclimate. Afternoon sea breezes from the coast arrive later and weaker, but southerly changes can funnel through the Hawkesbury River valley. The area records about 1200 mm of rain annually – noticeably higher than central Sydney. Fog and low cloud are common winter mornings, especially above the Berowra Creek valley.
How reliable are the 14‑day and hourly forecasts here?
Long‑range outlooks beyond 7 days are useful for trends, not precise timing. For day‑to‑day decisions, rely on the live forecast above and check the BOM Hornsby radar for approaching showers. The hornsby heights weather hourly breakdown is ideal for planning afternoon walks or garden work, as thunderstorms typically develop in the late afternoon during summer.
Is Hornsby Heights significantly cooler than the Sydney CBD?
Yes, particularly on warm days. The ridge and tree cover can make it 2–4 °C cooler than the city during summer heatwaves. Overnight lows are also several degrees lower, especially after clear winter nights.
Does the area get sudden thunderstorm activity?
Often in summer. The elevated terrain triggers rapid afternoon convection, especially when a trough sits over the ranges. Check the bom hornsby radar loop and the live forecast above for short‑term warnings.
Where can I find a weather in hornsby 10 days outlook?
The live forecast above includes a 10‑day overview. For more detail, the Bureau of Meteorology provides the official hornsby heights weather 14 day forecast, though confidence drops beyond day 7. The hourly breakdown is best for the next 48 hours.
For broader conditions, see our Sydney Weather page and Severe Weather Warning page. For more Australia‑wide outlooks, visit the Australia weather hub.