San Antonio pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in San Antonio is low; mugwort and ragweed are low. Tomorrow (10 August 2026) levels are similar - mugwort remains low, ragweed remains low, cypress at low levels, grass at low levels. Over the following five days mugwort and ragweed will increase; cypress and grass will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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San Antonio's river-focused green network, anchored by Brackenridge Park and the River Walk corridor, features oak, cedar, and pecan as the main tree pollen sources, with exposure varying between these green areas and the more built-up city centre. Surrounding Texas Hill Country and prairie grasslands contribute substantial grass and tree pollen, while the flat, open landscape allows pollen to disperse readily under prevailing southerly winds.
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
3/100
-
Ragweed (Ambrosia):
Low
14/100
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):
Low
4/100
-
Grass (Poaceae):
Low
4/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
11/100
-
Ragweed (Ambrosia):
Low
23/100
Air quality in San Antonio
View air qualityPollen forecast for neighborhoods and landmarks in San Antonio
Sports venues in San Antonio
Frequently Asked Questions
Is pollen high in San Antonio right now?
On 9 August 2026, overall pollen levels in San Antonio are low. Ambrosia is the main contributor to airborne pollen, while artemisia remain at lower levels
Will pollen levels change in San Antonio tomorrow?
On 10 August 2026, pollen conditions in San Antonio will be different from today, with ambrosia at low levels, artemisia at low levels, cypress at low levels, grass at low levels
Is pollen expected to decrease in San Antonio this week?
According to the five-day outlook, cypress and grass pollen levels are expected to gradually decrease, while ambrosia and artemisia pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in San Antonio?
On 9 August 2026, Ambrosia is the dominant pollen source in San Antonio. artemisia are also present but at lower levels. cypress and grass are not currently active.
When is pollen season in San Antonio?
How often is the San Antonio pollen forecast updated?
The San Antonio pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in San Antonio 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 Antonio 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 Antonio, 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 San Antonio.
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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.