Chelsea pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Chelsea is low; ragweed is low. Tomorrow (10 August 2026) levels are similar - ragweed increasing, grass at low levels, mugwort at low levels. Over the following five days ragweed will increase; grass and mugwort will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Chelsea has a nearby park's lawns and planted trees add a small share of grass and ragweed pollen.
Today - 9 August
-
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):
None
0/100
-
Ragweed (Ambrosia):
Low
11/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 10 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
17/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
25/100
-
Ragweed (Ambrosia):
Medium
47/100
Air quality in Chelsea
View air qualityFrequently Asked Questions
Is pollen high in Chelsea right now?
On 9 August 2026, overall pollen levels in Chelsea are low. Ambrosia is the main contributor to airborne pollen
Will pollen levels change in Chelsea tomorrow?
On 10 August 2026, pollen conditions in Chelsea will be different from today, with artemisia at low levels, grass at low levels and ambrosia increasing
Is pollen expected to decrease in Chelsea this week?
According to the five-day outlook, artemisia and grass pollen levels are expected to gradually decrease, while ambrosia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Chelsea?
On 9 August 2026, Ambrosia is the dominant pollen source in Chelsea. artemisia, cypress, and grass are not currently active.
When is pollen season in Chelsea?
How often is the Chelsea pollen forecast updated?
The Chelsea pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Chelsea 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 Chelsea 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 Chelsea, 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.
Want to see pollen forecasts for other cities in United States?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Chelsea.
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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.