Newcastle County Down pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Newcastle County Down is moderate; mugwort is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort increasing, grass at low levels.
7-Day Trend
Over the next week grass and mugwort will decrease; cypress and willow will remain stable.
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Features and forecast availability vary by region.
Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Moderate | 33/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | |
| Grass (Poaceae) | Low | 24/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | High | 67/100 |
Local Environmental Conditions
Residents in Newcastle County Down dealing with hay fever usually point to alder and birch as the culprits, particularly in spring near parks and gardens. The wider Newry, Mourne and Down countryside supplies additional tree and grass pollen, particularly when the area's changeable Atlantic weather carry it toward the built-up area. This mix of urban and rural influence gives Newcastle County Down a fairly typical pollen pattern for the wider region.
Want to know what triggers spring allergies in Newcastle County Down? Start with alder, then birch. You'll usually see alder pollen from around January through April, before birch takes over, usually March to May. Don't forget grass, either — it runs May to September and usually causes the most trouble in June and July. Worth keeping an eye on the forecast if you're sensitive.
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Frequently Asked Questions About Pollen in Newry, Mourne and Down
Is pollen high in Newcastle County Down right now?
On 20 September 2026, overall pollen levels in Newcastle County Down are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Newcastle County Down tomorrow?
On 21 September 2026, pollen conditions in Newcastle County Down will be different from today, with grass at low levels and artemisia increasing
Is pollen expected to decrease in Newcastle County Down this week?
According to the five-day outlook, artemisia and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Newcastle County Down?
On 20 September 2026, Artemisia is the dominant pollen source in Newcastle County Down. willow, cypress, and grass are not currently active.
When is pollen season in Newcastle County Down?
How often is the Newcastle County Down pollen forecast updated?
The Newcastle County Down pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Newcastle County Down come from nearby or far away?
Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.
Are pollen levels in Newcastle County Down based on measurements or forecasts?
Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.
Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Newcastle County Down, modern forecasts combine recent measurements, weather data, and information about local vegetation.
This allows us to estimate pollen levels for today and the coming days, not just report the past.
Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
