On June 1, 2025, a thick fog descended upon Sydney, leading to significant travel disruptions including flight delays, halted ferries, and dangerous road conditions.

The Bureau of Meteorology issued early warnings about hazardous driving conditions across all suburbs, advising drivers to proceed with extreme caution.

Visibility dropped to less than 100 meters during the morning peak hour, severely impacting all modes of transportation in the metro area.

The fog created hazardous driving conditions, causing major congestion on roads and affecting public transport services like buses and trains.

As a result of the low visibility, Sydney Ferries temporarily suspended all services.

At Sydney Airport, air traffic controllers spaced out arrivals and departures to manage the situation safely, resulting in flight delays and cancellations.

By 8:30 AM, the fog began to lift, allowing ferry services to resume around 9 AM, although the initial chaos highlighted the vulnerability of transport systems to weather disruptions.

The fog, which formed overnight and moved eastward, was characterized as radiation fog typical in autumn and winter, caused by cool temperatures and moisture in the atmosphere.

Current conditions included 89 percent humidity and calm winds, which are ideal for fog formation.

The fog was expected to linger for 1 to 2 hours, with a possibility of lasting longer in western areas.

Once the fog lifted, temperatures were forecasted to reach 18 degrees Celsius with occasional sunshine.

Travelers are encouraged to stay informed about weather conditions and allow extra time for travel, as extreme weather events are becoming more common globally.