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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Coast Pulse Hub Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Gymea is currently experiencing conditions as shown in the live forecast above, with a typical coastal-influenced pattern for this time of year. The suburb sits in Sydney’s southern shire, meaning its weather often blends ocean breezes with inland warmth.
What is the typical weather pattern for Gymea?
Gymea’s climate is shaped by its proximity to the Royal National Park and Port Hacking. Summers are warm and humid, with afternoon sea breezes providing relief, while winters are mild and relatively dry. The area receives moderate rainfall year-round, with autumn and early winter often delivering the most settled days.
- Summer (Dec-Feb): Average highs 26-28°C, humidity often above 60%
- Winter (Jun-Aug): Average highs 16-18°C, overnight lows near 8°C
- Rainfall: Heaviest in March-June, with occasional east coast lows
- Wind: Predominantly north-easterly sea breezes in the afternoon
How can I check the latest Gymea conditions?
For real-time updates, the Bureau of Meteorology provides the most reliable data. The gymea weather radar from the Terrey Hills station covers the area well, showing approaching rain bands. For planning ahead, the gymea weather 14 day forecast gives a useful outlook, though accuracy drops beyond seven days. If you need finer detail, the gymea weather hourly forecast is best for timing outdoor activities.
For broader conditions, check the Sydney weather page or the Australia weather hub. Those in the western suburbs may also find Penrith weather useful for comparison, as it is often several degrees warmer inland.
Does Gymea get severe storms?
Yes, particularly in spring and summer when thunderstorms develop over the Blue Mountains and track east. Hail, heavy rain and damaging wind gusts are possible, especially during La Niña years. The Bureau of Meteorology issues warnings via its severe weather warning page.
How does the sea breeze affect Gymea temperatures?
The afternoon north-easterly sea breeze typically arrives between 11am and 2pm, dropping temperatures by 3-6°C compared to inland suburbs. This effect is strongest in summer and can make Gymea noticeably cooler than Penrith or Campbelltown on hot days.
Is Gymea often foggy in winter?
Radiational fog is common on winter mornings, especially after clear nights and light winds. It usually clears by mid-morning as the sun strengthens. The nearby Hacking River valley can trap fog longer, reducing visibility below 200 metres at times.