Bangor, Gwynedd Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (8 October) pollen in Bangor, Gwynedd is low; mugwort, mold (alternaria), and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (9 October 2026) mold (alternaria) remains low, mold (cladosporium) remains low, mugwort increasing.
7-Day Trend
Over the next week mugwort, mold (alternaria), and mold (cladosporium) will decrease; cypress, grass, and willow will remain stable.
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Pollen Risk
Today - 8 October
| 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) | Low | 4/100 |
| Mold (Alternaria) | Low | 5/100 |
| Mold (Cladosporium) | Low | 16/100 |
Tomorrow - 9 October
| 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 | 26/100 | |
| Mold (Alternaria) | Low | 5/100 | |
| Mold (Cladosporium) | Low | 15/100 |
Local Environmental Conditions
Woodland makes up around 41% of the area near the center of Bangor, with a good deal of built-up land and some open grassland. Oak is the most prominent allergenic tree nearby, with ash and maple also present. Grasses are a major source, with plantain and pigweed adding to the weed pollen load.
Oak, ash and maple lead the season in late spring, as temperatures climb to around 10°C, and tree pollen reaches its peak. Grasses take over in midsummer, with temperatures around 15°C, and their pollen lingers into early fall. Later, plantain and pigweed keep weed pollen in the air from late spring into early fall. By early winter, pollen levels are low again.
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Frequently Asked Questions About Pollen in Gwynedd
Is pollen high in Bangor, Gwynedd right now?
On 8 October 2026, overall pollen levels in Bangor, Gwynedd are low. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Bangor, Gwynedd tomorrow?
On 9 October 2026, pollen conditions in Bangor, Gwynedd will be different from today, with artemisia increasing
Is pollen expected to decrease in Bangor, Gwynedd this week?
According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Bangor, Gwynedd?
On 8 October 2026, Artemisia is the dominant pollen source in Bangor, Gwynedd. cypress, grass, and willow are not currently active.
When is pollen season in Bangor, Gwynedd?
How often is the Bangor, Gwynedd pollen forecast updated?
The Bangor, Gwynedd pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Bangor, Gwynedd 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 Bangor, Gwynedd 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 Bangor, Gwynedd, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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. |
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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).
