Weather Update Grand Final Edition

Dry pattern will erode by early October with likely more mobile and active pattern evolves

• El Nino and weak Positive IOD combination peaking in September for impacts before a pushback from the Indian occurs as we move through October-December

• Increasing thunderstorm activity through Oct-Dec period

• Summer likely to see more dominant inland thunderstorm periods but a weaker monsoon across the Top End

• Increased trend of wetter and more thundery conditions over western SA to WA • 2027 outlook likely a breakdown of El Nino potentially for another wet autumn but not to 2026 levels before a more neutral ENSO pattern emerges through winter

September 26 2026 update SA.pdf

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• Overall SST’s will remain well above average around Australia into early 2027