Pollen count · Belgium
Pollen count in Brussels today
Today's pollen in Brussels and the three days after, species by species, from the CAMS Europe pollen model. The class is the clinical one: 20 grass grains per m³ is a high day, 20 birch grains a moderate one.
Today
No pollen worth counting in the air today. The next season here is Alder, from February.
Pollen is not a trigger today: if you have symptoms, look at dust, mould or indoor allergens.
Forecast from the CAMS Europe run of 2026-10-16 00:00 UTC. Updating live…
Today and the next three days
| Pollen | Fri 16 | Sat 17 | Sun 18 | Mon 19 |
|---|---|---|---|---|
| Alder | none | none | none | none |
| Birch | none | none | none | none |
| Grass | none | none | none | none |
| Mugwort | none | none | none | none |
| Olive | none | none | none | none |
| Ragweed | none | none | none | none |
Daily peak, grains per m³ of air. Classes: AAAAI National Allergy Bureau scale.
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Pollen seasons in Brussels
Typical months for Brussels's latitude; a warm spring moves them a week or two earlier, a cold one later.
- Alder: February – March
- Birch: March – May
- Grass: May – July
- Mugwort: July – August
- Olive: rare or absent here
- Ragweed: August – September
Questions
- What is the pollen count in Brussels today?
- None pollen today No pollen worth counting in the air today. The next season here is Alder, from February. Pollen is not a trigger today: if you have symptoms, look at dust, mould or indoor allergens.
- When is hay fever season in Brussels?
- Grass pollen, the main hay fever trigger, flies in Brussels from May to July. Birch comes earlier, March to May.
- Which pollen is worst in Brussels?
- For most sufferers grass and birch, and ragweed in late summer. The table above names the species doing it today.
- How is the pollen class worked out?
- Each species has its own thresholds (NAB scale): trees low from 1, moderate from 15, high from 90, very high from 1500 grains/m³; grass 1, 5, 20, 200; weeds 1, 10, 50, 500.
Pollen nearby
Amsterdam · Cologne · Paris · Frankfurt · London · Hamburg · Zurich · Geneva
Brussels weather now · Stars tonight in Brussels · all cities
How this forecast is made
Grains per cubic metre of air from the CAMS Europe pollen model (Copernicus, ~11 km, via Open-Meteo), daily peak in local time, classed per species on the AAAAI National Allergy Bureau scale. A model, not a trap count: a field of ragweed next door reads as its region. The live map shows the pollen field around Brussels hour by hour.