San Francisco pollen forecast — Glen Canyon Park neighborhood
Today (9 August) pollen in Glen Canyon Park, San Francisco is medium; mugwort and ragweed are medium; grass is low. Tomorrow (10 August 2026) levels are similar - grass remains low, ragweed remains medium, mugwort declining. 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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Glen Canyon Park's woodland and grassland make it one of San Francisco's more significant local pollen sites, with oak and eucalyptus as the main tree pollen sources alongside grass from the open hillside areas. Sheltered from the prevailing onshore winds by the surrounding hills, pollen lingers longer within the canyon than in more exposed parts of the city, meaning local vegetation drives exposure more strongly here than in coastal neighbourhoods.
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):
Low
19/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Medium
37/100
-
Ragweed (Ambrosia):
Medium
43/100
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
3/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
19/100
-
Ragweed (Ambrosia):
Medium
27/100
Other Landmarks in San Francisco
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Frequently Asked Questions
Is pollen high in San Francisco right now?
On 9 August 2026, overall pollen levels in San Francisco are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in San Francisco tomorrow?
On 10 August 2026, pollen conditions in San Francisco will be different from today, with ambrosia at medium levels, grass at low levels and artemisia continuing to decline
Is pollen expected to decrease in San Francisco 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 San Francisco?
On 9 August 2026, Ambrosia is the dominant pollen source in San Francisco. artemisia and grass are also present but at lower levels. cypress are not currently active.
When is pollen season in San Francisco?
How often is the San Francisco pollen forecast updated?
The San Francisco pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in San Francisco 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 San Francisco 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 San Francisco, 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 Glen Canyon Park, San Francisco.
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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.