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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Reef Brief Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
A Sydney coastal low is a low-pressure system that forms off the coast, bringing prolonged rain, strong winds, and hazardous surf. These systems are most common between autumn and spring, and the live forecast above shows the current impact for Sydney.
How does a coastal low affect Sydney weather?
A coastal low stalls near the coast, drawing in moist easterly winds. This produces steady, heavy rain that can last for two to three days. The pressure gradient tightens, causing strong southerly to easterly winds, particularly along the coast. Surf conditions become dangerous, with large swell and king tides possible.
What are the typical dangers?
Heavy rain from a coastal low can lead to flash flooding and river rises, especially in low-lying areas. Strong winds may bring down trees and power lines, while damaging surf causes coastal erosion. The Bureau of Meteorology issues warnings for these hazards, so check the severe weather warning page for updates.
How is a coastal low different from an east coast low?
An east coast low is a more intense, rapidly developing low that can cause explosive rainfall and destructive winds. A coastal low is generally less severe but still brings prolonged wet and windy conditions to Sydney.
Can I surf during a coastal low?
No. Coastal lows generate very large, powerful surf with strong rips and king tides. The combination of hazardous surf and strong winds makes conditions extremely dangerous for swimmers and surfers. Avoid entering the water.
Where can I find the latest warnings?
The Bureau of Meteorology (BoM) issues the official warnings. You can also check the live forecast above for the latest conditions, or visit the Sydney Weather page for local updates.