Home › Weather › Arncliffe Weather
Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Southern 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 ·
Arncliffe’s weather is shaped by its position in Sydney’s inner-south, where coastal humidity meets the rain shadow of the Illawarra escarpment. The live forecast above gives the immediate conditions, but the broader pattern is a mild, temperate climate with warm summers and cool, damp winters.
What makes Arncliffe’s weather different from central Sydney?
Arncliffe sits about 10 kilometres south of the Sydney CBD, close to Botany Bay. This means it often catches sea breezes that moderate summer heat, but it can also trap moisture from the bay, leading to higher humidity than suburbs further inland. Winter mornings are frequently foggy, and afternoon south-easterlies can drop temperatures sharply compared to western suburbs.
What’s the typical seasonal pattern?
Summer (December–February) averages around 26°C, with occasional heatwaves pushing past 35°C when north-westerly winds blow from the interior. Autumn and spring are transitional, with mild days and cool nights. Winter (June–August) sees daytime highs near 17°C, with overnight lows around 8°C. Rainfall is spread fairly evenly across the year, though late summer and early autumn tend to be wettest due to east coast lows.
Does Arncliffe get much fog?
Yes, especially in winter. The combination of Botany Bay moisture and cool overnight temperatures often produces thick fog that can linger until mid-morning, particularly in low-lying areas near the Cooks River.
How reliable is the Arncliffe weather 14 day forecast?
Like most coastal Sydney forecasts, the 14-day outlook is useful for trends but becomes less accurate after about day 7. For precise planning, check the arncliffe weather hourly forecast on the day, as sea breezes can shift conditions quickly.
Is Arncliffe affected by severe storms?
Occasionally. East coast lows in late summer can bring heavy rain and damaging winds. The suburb’s proximity to Botany Bay means storm surges are rare, but flash flooding can occur along the Cooks River catchment. Check our severe weather warning page for alerts.
For broader conditions, see our Sydney weather page, or check Australia weather hub for other regions. If you’re heading south, Melbourne weather and Adelaide weather pages offer similar detail. For coastal comparisons, Wollongong weather and Perth weather are also available. The arncliffe weather bom data is the most authoritative source for official observations.