Pollen Count in Heemstede

Values in gr/m³ (pollen grains per cubic metre).

4-Day Chart
Annual Overview

📱 Know your air. Daily Heemstede pollen levels on your iPhone.

In winter, pollen levels are often low in Heemstede. Hazel and alder can start releasing pollen as early as January. Their season often continues into March. Mild weather may bring these trees into bloom sooner.

In spring, more trees release pollen. Birch pollen is common around April and May. Oak, beech, and plane trees may also release pollen. These tiny grains can bother people with allergies during this time in Heemstede.

Grass pollen season usually starts in May and can last until August. Levels are often highest in June and July. Grasses grow in fields, parks, and roadside areas around Heemstede, and release pollen into the air.

In late summer and autumn, mugwort can release pollen, usually from July through September. Ragweed pollen is less common in the Netherlands. Weed pollen may still affect people with allergies on warm, dry days in Heemstede.

Updated: 8 Oct 2026.

Pollen Forecast Chart

Recommendations

When pollen concentrations reach a peak, we suggest these simple steps to help with hay fever. These tips are extra important on windy days when plants are in peak anthesis (the time when they release the most pollen).

Wear masks if necessary
Shower after going out
Wear sunglasses if windy
Close windows and doors
Use an indoor air purifier
Avoid wearing woolen clothes outside
Limit outdoor activities

Annual Pollen Overview

Check out this month-by-month overview of the daily average pollen count in Heemstede 🌾. This data is based on previous years and serves as a guideline to help you understand when different pollen seasons typically occur in your city.

	Alder	Birch	Grass	Mugwort	Olive	Ragweed
Jan	2.9	0	0	0	0	0
Feb	40.9	0	0	0	0	0
Mar	7.2	275.4	0.1	0	0	0
Apr	0.4	178.9	9.1	0	0.7	0
May	0	15.2	61.2	0	1.2	0
Jun	0	0.3	395.9	36.6	0	0
Jul	0	0	189.6	152.1	0	0
Aug	0	0	77.6	43.3	0	0.4
Sep	0	0	12.5	1.4	0	11.7
Oct	0	0	1.3	0	0	0
Nov	0	0	0	0	0	0
Dec	0	0	0	0	0	0

Values in gr/m³ (pollen grains per cubic metre).

Nearby Places

Disclaimer * The pollen count information provided for Heemstede is for educational purposes only, sourced from the CAMS European air quality database. We cannot guarantee its accuracy or reliability. This information is not a substitute for professional medical advice. Consult a qualified healthcare provider for medical concerns. We are not medical professionals.