Selwyn pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Selwyn is medium; ragweed is medium; mugwort is low. Tomorrow (10 August 2026) levels are similar - ragweed remains medium, mugwort increasing, grass at low levels. Over the following five days grass, mugwort, and ragweed will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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Nearby, within the neighborhood, the nearest stream or river hosts hazel and willow, two of the most allergenic early-season trees. Here, not far from here, woodland dominated by oak and birch, with birch a leading regional tree-pollen allergen. Local wind exposure and land use can shift the exact mix slightly from block to block.
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):
Low
24/100
-
Ragweed (Ambrosia):
Medium
29/100
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
12/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Medium
40/100
-
Ragweed (Ambrosia):
Medium
48/100
Air quality in Selwyn
View air qualityFrequently Asked Questions
Is pollen high in Selwyn right now?
On 9 August 2026, overall pollen levels in Selwyn are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia remain at lower levels
Will pollen levels change in Selwyn tomorrow?
On 10 August 2026, pollen conditions in Selwyn will be different from today, with grass at low levels, ambrosia at medium levels and artemisia increasing
Is pollen expected to decrease in Selwyn this week?
According to the five-day outlook, grass, ambrosia, and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Selwyn?
On 9 August 2026, Ambrosia is the dominant pollen source in Selwyn. artemisia are also present but at lower levels. grass and cypress are not currently active.
When is pollen season in Selwyn?
How often is the Selwyn pollen forecast updated?
The Selwyn pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Selwyn 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 Selwyn 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 Selwyn, 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.
Check pollen in other popular cities:
Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Selwyn.
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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.