Toronto pollen forecast — Swansea neighborhood
Today (9 August) pollen in Swansea, Toronto is medium; ragweed is medium; mugwort is low. Tomorrow (10 August 2026) levels are similar - mugwort remains low, ragweed remains medium, 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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In Swansea, Toronto, hazel and willow line the Humber River, and their pollen carries easily on the wind. Around Swansea, Toronto, oak and birch grow in a nearby forest; birch is a potent tree allergen. Swansea, Toronto has nearby parkland rounds out the local pollen picture with turf grass and planted trees.
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
8/100
-
Ragweed (Ambrosia):
Medium
30/100
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
2/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
19/100
-
Ragweed (Ambrosia):
Medium
42/100
Other Landmarks in Toronto
Sports venues in Toronto
Frequently Asked Questions
Is pollen high in Toronto right now?
On 9 August 2026, overall pollen levels in Toronto are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia remain at lower levels
Will pollen levels change in Toronto tomorrow?
On 10 August 2026, pollen conditions in Toronto will be different from today, with ambrosia at medium levels, artemisia at low levels, grass at low levels
Is pollen expected to decrease in Toronto this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in Toronto?
On 9 August 2026, Ambrosia is the dominant pollen source in Toronto. artemisia are also present but at lower levels. cypress and grass are not currently active.
When is pollen season in Toronto?
How often is the Toronto pollen forecast updated?
The Toronto pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Toronto 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 Toronto 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 Toronto, 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: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Swansea, Toronto.
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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.