Thunderstorm asthma season – are you prepared?

25 September 2025

In Victoria, the grass pollen season usually runs from 1 October to 31 December. During this time, you may notice an increase in asthma and hay fever. The season also brings the chance of thunderstorm asthma.

People at risk of thunderstorm asthma include those with:

  • Current or past asthma
  • Undiagnosed asthma
  • Springtime hay fever (noting in south-east Australia, springtime hay fever is often triggered by grass pollen).
    The risk is even higher for people who have both asthma and hay fever, especially if their asthma is poorly controlled.

Victorian Department of Health resources

Visit the Better Health website for information on thunderstorm asthma including useful information for your patients such as explainer videos, protection tips, asthma first aid and case studies

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