Christchurch pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Christchurch is high; mugwort is high.
Pollen Tomorrow
Tomorrow (21 September 2026) mugwort declining.
7-Day Trend
Over the next week mugwort will increase; cypress, grass, and willow will remain stable.
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Local pollen and air quality forecasts, interactive pollen maps and route profiles
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) | High | 55/100 |
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 | 49/100 |
Local Environmental Conditions
Christchurch's parks and green spaces feature oak and plane as the main tree pollen sources, with exposure varying between these greener areas and the more built-up town centre. The nearby surrounding hills adds further grass and tree pollen exposure, particularly under the region's typical south-westerlies. Hay fever sufferers here typically notice symptoms peaking in late spring, then again during the summer grass season.
If you're wondering when hay fever kicks off in Christchurch, it's mostly down to oak and plane. Oak pollen typically runs from April to May, then plane carries on from April until June. Grass pollen then stretches from May into September, with the worst of it typically landing in June and July. Worth factoring in if hay fever's ever been an issue for you here.
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Frequently Asked Questions About Pollen in Dorset
Is pollen high in Christchurch right now?
On 20 September 2026, overall pollen levels in Christchurch are high. Artemisia is the main contributor to airborne pollen
Will pollen levels change in Christchurch tomorrow?
On 21 September 2026, pollen conditions in Christchurch will be different from today, with artemisia continuing to decline
Is pollen expected to decrease in Christchurch this week?
According to the five-day outlook, artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Christchurch?
On 20 September 2026, Artemisia is the dominant pollen source in Christchurch. cypress, grass, and willow are not currently active.
When is pollen season in Christchurch?
How often is the Christchurch pollen forecast updated?
The Christchurch pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Christchurch 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 Christchurch 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 Christchurch, 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).
