Pollen Count Cardiff Today: Hay Fever Forecast

Tuesday 13 October: the pollen level in Cardiff is low (CAMS model forecast). The most common pollen in the air is grass: 0 grains/m³ as a daily mean. The UK pollen season is essentially over; the next one starts with hazel and alder in January to March. Wednesday: low. Thursday: low. Friday: low.

Alder

low · 0

Birch

low · 0

Grass

low · 0

Mugwort

low · 0

PM2.5

4.1 µg/m³

4.5 µg/m³

3.6 µg/m³

3.1 µg/m³

Max temp

17.5°C

16.7°C

17.5°C

Rain

1.1 mm

0.7 mm

4 mm

Bar height is the level (low, moderate, high, very high); the number is grains/m³. Tap a day to see its wind on the map.

CAMS model forecast from 13 October at 01:00 BST, weather from the ECMWF model run of 13 October at 07:00 BST. Model values are shown unchanged; this is not a measurement or an official forecast.

Level scale (daily mean concentration, grains/m³; US National Allergy Bureau scale, AAAAI, as the UK has no open national scale): trees moderate from 15, high from 90, very high from 1500; grass from 5, 20 and 200; weeds (mugwort) from 10, 50 and 500. People with hay fever can have symptoms at low levels too.

Hay fever in Cardiff

Cardiff has an early season thanks to its mild coastal climate: tree pollen such as birch can start in March and peaks in April. Grass pollen follows from late May into July, carried in from the farmland of the Vale of Glamorgan to the west and the valleys to the north. Winds off the Bristol Channel often bring cleaner air, and the highest days tend to come in warm, dry spells with a northerly or easterly wind.

Air quality in Cardiff

CAMS forecasts a daily mean of 4.1 µg/m³ of PM2.5 today, below the WHO 24-hour guideline of 15 µg/m³. Air pollution can make hay fever and asthma symptoms worse. Official forecast: Defra UK-AIR.

When plants release pollen

Pollen calendar and where the data comes from

A typical UK year: hazel and alder from January to March, birch from late March to mid-May (the main tree allergen, about one in four hay fever sufferers react to it), grass from mid-May to July, usually in two peaks (early to mid-June and early July), and weeds such as nettle, dock and mugwort from June to September. Scotland runs about two weeks behind the south of England. CAMS does not model hazel, nettle or plane tree.

CAMS (a European ensemble of models, median) computes every hour how much alder, birch, grass, mugwort, ragweed and olive pollen is in the air over Europe, on a grid of about 10 km, four days ahead. On the map, particles start where the model puts pollen in the air today and drift on the ECMWF wind. UK pollen calendar

Pollen count Cardiff today: hay fever forecast for 4 days

Hay fever in Cardiff

Air quality in Cardiff

When plants release pollen

Official sources

Other UK cities