Milford Haven pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Milford Haven 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 | 35/100 |
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 | 9/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | High | 58/100 |
Local Environmental Conditions
Milford Haven's parks and green spaces feature birch and oak as the main tree pollen sources, with exposure varying between these greener areas and the more built-up town centre. Surrounding Pembrokeshire farmland contributes substantial grass and tree pollen, moving into town when winds blow from the east. It's a pattern shared by plenty of similarly sized towns nearby, shaped more by geography than anything unusual locally.
Ask anyone with allergies in Milford Haven and they'll tell you it's birch and oak that cause the trouble. Then grass pollen takes the baton from May all the way to September, usually peaking in June and July — that's when most people really feel it. Birch pollen typically runs from March to May, and oak keeps things going from April right through to May. Useful to know if you tend to feel it every spring.
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Frequently Asked Questions About Pollen in Pembrokeshire
Is pollen high in Milford Haven right now?
On 20 September 2026, overall pollen levels in Milford Haven are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Milford Haven tomorrow?
On 21 September 2026, pollen conditions in Milford Haven will be different from today, with grass at low levels and artemisia increasing
Is pollen expected to decrease in Milford Haven 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 Milford Haven?
On 20 September 2026, Artemisia is the dominant pollen source in Milford Haven. cypress, grass, and willow are not currently active.
When is pollen season in Milford Haven?
How often is the Milford Haven pollen forecast updated?
The Milford Haven pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Milford Haven 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 Milford Haven 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 Milford Haven, 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).
