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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Oz Reviewly Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Castle Cove weather today is mild with a mix of sun and cloud, as shown in the live forecast above. This coastal suburb of Sydney typically experiences warm summers and cool winters, with rainfall spread fairly evenly throughout the year.
What is the typical climate for Castle Cove?
Castle Cove sits within Sydney’s temperate climate zone. Summers (December to February) average around 26°C, with occasional humid days and afternoon sea breezes. Winters (June to August) are cooler, with daytime highs near 17°C and overnight lows around 8°C. Rainfall is moderate year-round, with autumn and early winter often the wettest periods.
How does the local geography affect Castle Cove weather?
Located on Middle Harbour, Castle Cove is influenced by coastal conditions. The harbour can bring cooler sea breezes in summer, moderating heat. The area’s hills and tree cover also create localised microclimates, meaning temperatures can vary slightly between the waterfront and higher streets. Fog is more common in winter mornings near the water.
Does Castle Cove get severe storms?
Yes, like much of Sydney, Castle Cove can experience thunderstorms, especially in spring and summer. These may bring heavy rain, hail, or damaging winds. Check the live forecast above and any severe weather warnings for updates.
Is Castle Cove weather similar to Castle Hill weather?
Castle Cove and Castle Hill weather are both in Sydney but differ slightly. Castle Cove is coastal, so it’s often a few degrees cooler in summer and less prone to inland heat extremes. Castle Hill, being inland, can be hotter in summer and colder in winter.
When is the best time to visit Castle Cove?
Autumn (March to May) and spring (September to November) offer the most comfortable weather, with mild temperatures and lower humidity. Summer can be warm but pleasant near the water, while winter is cool but generally sunny.