Sydney Environment: Climate and Weather Update September 2026

Sydney's climate and environmental conditions are being monitored as the city experiences warmer than average temperatures and changing rainfall patterns. The Bureau of Meteorology has issued updated forecasts as the city enters its spring season.

Temperature and rainfall trends

The Bureau of Meteorology has recorded warmer than average temperatures across Sydney during the winter months, with rainfall patterns showing significant variation across the metropolitan area. The city's western suburbs have received below-average rainfall, while the coastal areas have experienced more typical precipitation levels. The trend is consistent with broader climate patterns affecting eastern Australia.

The changing rainfall patterns are impacting Sydney's water supply and urban green spaces. The NSW Government has monitored water storage levels across the metropolitan area, with the Warragamba Dam and Prospect Reservoir remaining at adequate levels despite the drier conditions. The NSW Environment Department has issued guidance on water conservation measures for the upcoming spring and summer months.

Urban heat and green spaces

Sydney's urban heat island effect continues to be a concern, with the city's CBD and dense suburban areas experiencing higher temperatures than the surrounding regions. The NSW Government has invested in urban greening programs, including the expansion of parks and the planting of street trees across the metropolitan area. The Barangaroo and Parramatta precincts have seen significant investment in public green spaces.

The Western Sydney Airport development includes significant environmental considerations, with the project incorporating green spaces and sustainable design principles. The aerotropolis precinct is expected to include extensive parkland and environmental buffers.

What to expect

The Bureau of Meteorology is forecasting a warmer than average spring for Sydney, with above-average temperatures expected across the metropolitan area. The Bureau of Meteorology provides updated forecasts and weather warnings. The NSW Environment Department publishes environmental monitoring data and guidance.

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The Bureau of Meteorology provides updated forecasts at Bureau of Meteorology. The NSW Environment Department publishes environmental data at NSW Environment. The Destination NSW festival guide is available at Destination NSW.