If your hayfever seems to arrive before spring, linger into summer or flare on a day that feels completely out of season, you are not imagining it. Australia does not have one national hayfever season because pollen patterns shift with climate, vegetation and local weather.1,3
Across much of southern Australia, grass pollen is usually most noticeable in spring. Brisbane and other warmer northern areas can experience later, longer or repeated peaks, which is why a calendar is most useful as a guide rather than a fixed rule.1,3
Knowing your region’s usual pattern gives you a clearer starting point when symptoms begin. For adults seeking non-drowsy seasonal hayfever symptom relief, BreathMor® is a clinically trialled* nasal spray powered by a plant-based active ingredient derived from Cinnamomum verum (Cinnamon) stem bark extract. It contains no antihistamines, steroids or corticosteroids and helps to provide relief from sneezing, nasal congestion, runny nose, itchy eyes, nasal itching and eye redness.
ALWAYS READ THE LABEL AND FOLLOW THE DIRECTIONS FOR USE. Adults only. If symptoms persist, talk to your health professional. Contains Sulfites (Sodium bisulfite).
Key takeaways
- Australia’s pollen seasons vary by region rather than following one national calendar.1,3
- Grass pollen is a major seasonal trigger, but tree and weed pollen can peak at different times.1,2
- A seasonal calendar shows what usually happens; a daily pollen forecast helps with today.7
- Rain can lower airborne pollen on the day but support plant growth before a later peak.4,6
- Wheezing, shortness of breath or severe asthma symptoms need urgent medical attention.5
When Is Hayfever Season in Australia?
Ask three Australians when hayfever season begins and the answers can all be right. In Melbourne, the main grass-pollen period is typically concentrated in spring. Further north, warmer conditions and different grasses can stretch the season into summer or create several smaller peaks.1,3
Tree pollen can also appear before the main grass season, while weed pollen may remain relevant at other times. That is why the month alone never tells the whole story: the pollen source, recent weather and local vegetation all shape when symptoms are most likely to flare.1,2,6
Why Australia Does Not Have One Allergy Season
Australia spans temperate, subtropical and tropical climate zones, each supporting a different mix of grasses, trees and weeds. Introduced pasture grasses, exotic trees and common weeds are important allergenic pollen sources, but their flowering periods vary from one region to another.1,2
Seasonal Calendar vs Daily Pollen Forecast
Think of the seasonal calendar as the big picture and the daily forecast as the close-up. The calendar helps you prepare for the months that are usually difficult, while the forecast helps you decide whether today’s conditions are likely to be challenging before you exercise, garden, commute or spend time outdoors.7
Hayfever Season Australia: At-a-Glance Calendar
The regional patterns below show why a single national date is not very useful. They focus on broad grass-pollen timing, with tree and weed pollen, local vegetation and weather capable of extending the season at either end.1,2,3
| Region or city | Typical higher-pollen period | Common pattern | What to check locally |
|---|---|---|---|
| Sydney, Canberra and the ACT | Main spring peak, with smaller summer peaks | Tree pollen can begin before the main grass-pollen period.1,3 | Daily city forecast and wind |
| Melbourne, regional Victoria and Tasmania | Spring, commonly October to December | A concentrated spring grass-pollen season, often strongest around October and November.1,3 | Daily pollen and thunderstorm advice |
| Brisbane and South-East Queensland | Summer to autumn | Several grass-pollen peaks can occur rather than one short spring peak.1,3 | Brisbane pollen forecast |
| Adelaide and Perth | Spring to early summer | Dry, windy conditions and local grasses or weeds can change exposure.1,2 | Local forecast and wind |
| Darwin, tropical north and regional Australia | Varies with wet-dry cycles and local vegetation | Timing can differ substantially from southern spring calendars.1,2 | Local forecasts and health advice |
These periods are a starting point, not a prediction for a particular day. Use them to recognise your broader seasonal window, then check your local daily pollen forecast before making plans.
Why Pollen Peaks Shift Across the Season
Even within the usual season, pollen levels do not rise in a straight line. A few days of warm, dry weather, a change in wind or rainfall earlier in the season can move exposure above or below what the calendar suggests.4,6
Hot, Dry and Windy Days
Warm, dry conditions encourage some plants to release pollen, and wind can carry it well beyond the source. This is why a windy day can feel worse than a still one, even when both fall within the same month.1,4
Rain, Humidity and the Weeks Before a Peak
A wet day can temporarily clear pollen from the air, which can bring short-lived relief. Over the preceding weeks, however, rain can support more plant growth, increasing the amount of pollen available once conditions become warm and dry again.4,6
Thunderstorms and Asthma Risk
Thunderstorm asthma is a separate and more serious risk. When high grass-pollen levels combine with particular storm conditions, pollen can break into tiny allergen particles that travel deep into the lungs.5
If you have asthma, follow your asthma action plan and local warnings. Call triple zero (000) for severe breathing difficulty. Hayfever products should not be relied on to prevent or treat asthma.5
Is It Hayfever Season Today? A Quick Check
When symptoms appear, start with your local pollen forecast and current weather, then think about what changed in the hours beforehand. Time outdoors, strong wind, lawn mowing and flowering grasses can all provide useful context.7
Next, notice whether symptoms ease when you move away from the suspected exposure. If the pollen count is low, other triggers such as mould, dust mites, smoke or pets may be involved instead.1,4
Keeping a short note of the date, weather, activity and symptoms can make the pattern easier to recognise. If the trigger remains unclear or symptoms persist, take that record to a pharmacist or GP.
How to Prepare for Hayfever and Reduce Exposure
Once you know your usual pattern, preparation becomes less about avoiding the outdoors and more about choosing the right moments. A few simple habits can make the season easier to navigate:
- Check a trusted local forecast before the months when symptoms usually return, then use daily readings to plan outdoor time.7
- On higher-pollen, hot or windy days, move exercise, gardening or outdoor events to lower-pollen periods when practical.1,4
- Keep windows closed, dry washing indoors and avoid mowing when grass is a known trigger.1,4
- After extended time outdoors, shower, wash your hair and change clothes before moving through the home.4
These habits are most useful when they become part of a routine rather than a last-minute response after symptoms begin. For a closer look at recognising triggers and early symptoms, read what causes hayfever and the early signs of hayfever.
A Clinically Trialled* Nasal Spray Powered by a Plant-Based Active Ingredient
Seasonal planning can reduce exposure, but it cannot remove every trigger. For adults seeking a non-drowsy nasal option, BreathMor® is powered by a plant-based active ingredient derived from Cinnamomum verum (Cinnamon) stem bark extract. It contains no antihistamines, steroids or corticosteroids and has been clinically trialled*.
It helps to provide relief from sneezing, nasal congestion, runny nose, itchy eyes, nasal itching and eye redness associated with seasonal hayfever. The cited evidence relates to the finished product.
Explore a nasal spray powered by a plant-based active ingredient or learn how BreathMor® works.
ALWAYS READ THE LABEL AND FOLLOW THE DIRECTIONS FOR USE. Adults only. If symptoms persist, talk to your health professional. Contains Sulfites (Sodium bisulfite).
When to Get Professional Advice
Most seasonal flares can be discussed with a pharmacist, but it is worth seeing a GP when symptoms persist, disrupt sleep or work, resemble an infection or do not respond to your usual plan. Breathing difficulty needs urgent care, particularly if you have asthma.4,5
Your Local Pattern Matters More Than a National Date
Because Australia’s pollen seasons vary by region, the most useful routine is one built around your local pattern. Record the months, weather and activities linked with symptoms so you can recognise changes from one season to the next.
Once that pattern is clear, you can plan outdoor time, reduce pollen transfer indoors and discuss ongoing symptoms with a pharmacist or GP. BreathMor® is a clinically trialled*, non-drowsy nasal spray that helps to provide relief from seasonal hayfever symptoms such as sneezing, nasal congestion, runny nose, itchy eyes, nasal itching and eye redness.
ALWAYS READ THE LABEL AND FOLLOW THE DIRECTIONS FOR USE. Adults only. If symptoms persist, talk to your health professional. Contains Sulfites (Sodium bisulfite).
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Frequently asked questions about Hayfever Season
When is hayfever season in Australia?
There is no single national season. Spring is important in many southern areas, while northern regions can have longer, later or repeated peaks.1,3
Is it hayfever season now?
Check your local forecast and current weather. A seasonal calendar cannot confirm what is in the air today.7
Which month is hayfever worst in Australia?
It varies by region and year. Melbourne often peaks in spring, while Brisbane can have several peaks across summer and autumn.1,3
Why do I have hayfever outside spring?
Possible reasons include tree or weed pollen, northern grass seasons, weather variation or a non-pollen trigger.1,2,4
Does rain make hayfever better or worse?
Rain can reduce airborne pollen that day, but wetter preceding weeks can support plant growth and increase the later pollen load.4,6
How can I prepare for allergy season?
Monitor local forecasts, reduce pollen transfer indoors and keep a symptom record. Seek advice if symptoms persist.4,7
Can thunderstorms make hayfever or asthma worse?
Certain thunderstorms during grass-pollen season can trigger serious asthma symptoms. Follow local warnings and seek urgent help for severe breathing difficulty.5
References
1. Australasian Society of Clinical Immunology and Allergy (ASCIA). Pollen Allergy.
https://www.allergy.org.au/patients/allergic-rhinitis-hay-fever-and-sinusitis/pollen-allergy
2. Australasian Society of Clinical Immunology and Allergy (ASCIA). Guide to Common Allergenic Pollen.
3. Queensland University of Technology (QUT)/AusPollen. Australian Cities Have Different Grass-Pollen Seasons.
https://www.qut.edu.au/news?id=182213
4. Healthdirect Australia. Pollen Allergy.
https://www.healthdirect.gov.au/pollen-allergy
5. Healthdirect Australia. Thunderstorm Asthma.
https://www.healthdirect.gov.au/thunderstorm-asthma
6. Influence of ENSO, Droughts and Temperature Rise on Pollen Concentrations and Seasons in Three Australian Cities. Science of the Total Environment. 2025.
https://pubmed.ncbi.nlm.nih.gov/40187332/
7. Australian Pollen Forecast.
https://www.pollenforecast.com.au/
* Steels E, et al. Complementary Therapies in Medicine. 2019;47:102198.
https://pubmed.ncbi.nlm.nih.gov/31780001/
Walanj A, et al. Journal of Herbal Medicine. 2014;4:37–47.
https://www.sciencedirect.com/science/article/abs/pii/S2210803314000037
