The influenza season in Australia typically begins in April and ends in October. However, the onset and duration can vary depending on several factors, including regional climate differences.

Peak Months for Influenza Activity

While the flu season starts in April, the real adversaries are the months between June and September. These are the peak months when influenza activity is at its highest, with August often being the most active. This period is commonly referred to as the influenza season.

However, in some years, the influenza virus will buck the trend. For example, the 2022 flu season started and ended earlier than in recent years, reaching its peak in June and dropping sharply in July.

Monitoring influenza flu activity is made possible by a variety of resources, such as the National Notifiable Diseases Surveillance System.

Regional Variations in Flu Season

While the flu season generally starts in April across Australia, the exact timing can vary from state to state. Factors such as regional climate differences can influence when the flu season begins and how long it lasts. This means that while one region might be experiencing the onset of flu season, another could still await its arrival.

For instance, in New South Wales, the flu season might start a little earlier or later than in Victoria due to differences in temperature and humidity. Coastal areas might see different patterns compared to inland regions, with ocean breezes possibly delaying the onset. Moreover, urban environments can also affect the timing and spread of the flu, with higher population densities potentially leading to earlier and more rapid transmission of the virus.

Given this variability, it is vital to stay updated on local flu activity. Health authorities like the Influenza Surveillance Program monitor flu activity, which can be an invaluable resource for individuals trying to determine the best time to prepare for flu season.

Regional Variations in Flu Season

While most healthy adults can recover from the flu without seeing a doctor, certain groups are at a higher risk of severe illness. These include:

• Elderly individuals

• Young children

• Pregnant women

• Aboriginal and Torres Strait Islander people

• Those with chronic conditions like heart disease or severe asthma.

Managing health risks and taking additional precautions during the flu season is especially important for those with weakened immune systems, as they belong to the vulnerable groups.