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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Australia Focus Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
If you’re heading out in Mortdale today, the live forecast above gives you the immediate picture, but the key takeaway is that conditions in this southern Sydney suburb are shaped by coastal influences and the nearby Georges River, meaning you should always plan for a possible afternoon shift.
What makes Mortdale’s weather different from central Sydney?
Mortdale sits about 17 kilometres south-west of the Sydney CBD, and its weather often runs a degree or two cooler than the city centre, particularly in the mornings. The proximity to Botany Bay and the Royal National Park means sea breezes can arrive earlier here, dropping temperatures faster than in western suburbs. If you’re checking the Sydney Weather page, remember Mortdale can be a touch milder, especially in summer.
What’s the best way to track Mortdale’s conditions?
For the most accurate picture, combine the live forecast above with the mortdale weather radar, which shows rain moving in from the coast. The mortdale weather hourly breakdown is your best friend for planning the afternoon, as showers often develop quickly. If you’re after a longer view, the mortdale weather 14 day forecast gives a reliable trend, while the weather in mortdale 10 days is ideal for weekend plans. For severe storms, check our Severe Weather Warning page.
Does Mortdale get much rain compared to other Sydney suburbs?
Yes, Mortdale receives slightly above-average rainfall for Sydney, around 1,200 mm annually, due to its position near the coast and the Georges River valley which can funnel showers in from the east.
When is the best time to visit Mortdale for fine weather?
Late summer and early autumn (February to April) offer the most stable conditions, with warm days around 25–27°C and lower humidity than mid-summer, though afternoon sea breezes are common.
How reliable are long-range forecasts for Mortdale?
The mortdale weather 14 day forecast is useful for trends, but day-to-day accuracy drops after about 7 days. For precise plans, rely on the 3–5 day outlook and the live forecast above.