West Mersea pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in West Mersea is moderate; mugwort is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass and mugwort will increase; 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 | 37/100 |
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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | Moderate | 44/100 |
Local Environmental Conditions
In West Mersea, sycamore and oak dominate the local tree pollen picture, with parks and tree-lined residential streets offering more exposure than the compact centre. The nearby nearby reservoir adds further grass and tree pollen exposure, particularly under easterly winds. Seasonal peaks tend to track the wider regional pattern, tree pollen leading in spring and grass through summer.
So here's the rundown for West Mersea: sycamore pollen shows up first, then oak takes over. Don't forget grass, either — it runs May to September and usually causes the most trouble in June and July. Sycamore pollen typically runs from April to June, before oak takes over, usually April to May. Not a bad idea to stock up on antihistamines before it all kicks off.
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Frequently Asked Questions About Pollen in Essex
Is pollen high in West Mersea right now?
On 20 September 2026, overall pollen levels in West Mersea are moderate. Artemisia is the main contributor to airborne pollen
Will pollen levels change in West Mersea tomorrow?
On 21 September 2026, pollen conditions in West Mersea will be similar to today, with artemisia at moderate levels
Is pollen expected to decrease in West Mersea this week?
According to the five-day outlook, artemisia and grass pollen levels will increase later in the week.
Which pollen types are currently active in West Mersea?
On 20 September 2026, Artemisia is the dominant pollen source in West Mersea. cypress, grass, and willow are not currently active.
When is pollen season in West Mersea?
How often is the West Mersea pollen forecast updated?
The West Mersea pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in West Mersea 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 West Mersea 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 West Mersea, 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).
