Pollen today
Loading today’s values…
Ragweed is moderate in San Antonio today.
Tree and grass pollen are very low. Ragweed should stay moderate through Wednesday.
Today in San Antonio, TexasTuesday, November 3
Weed3ModerateRagweed
Tree1Very lowElm
Grass1Very lowGrasses
Next four days, highest level each day:
Wed3Moderate
Thu2Low
Fri3Moderate
Sat3Moderate
Source: Includes pollen data from GoogleGoogle Maps
Source: Includes pollen data from GoogleIncludes data from Google Maps
Plant by plant
Google’s index for each plant it models in San Antonio today. A plant out of season has no index.
Plants in San AntonioTuesday, November 3
Ragweed3Moderate
Elm1Very low
Grasses1Very low
AlderNo index
AshNo index
BirchNo index
CottonwoodNo index
JuniperNo index
MapleNo index
OakNo index
PineNo index
Source: Includes pollen data from GoogleGoogle Maps
Weather and air in San Antonio
The forecast that moves pollen around, and the air beside it.
Weather forecast
- This Afternoon
- Sunny. High 78 °F. Wind N 5 to 10 mph. 2% chance of precipitation.
- Tonight
- Mostly Clear. Low 55 °F. Wind N 5 mph.
Forecast: National Weather Service, updated 1:44 pm CT.
Pollen alerts for San Antonio by email
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San Antonio’s year in pollen
Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Records for San Antonio began on October 14, 2026. Each week adds a square.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
Tree
Grass
Weed
0 None1 Very low2 Low3 Moderate4 High5 Very highThis weekNot recorded
See it as a table
| Week | Tree | Grass | Weed |
|---|---|---|---|
| Oct 28 to Nov 3 | 1 Very low | 1 Very low | 3 Moderate |
| Oct 21 to Oct 27 | 2 Low | 2 Low | 4 High |
| Oct 14 to Oct 20 | 2 Low | 3 Moderate | 5 Very high |
Source: Includes pollen data from GoogleIncludes data from Google Maps
Beyond today’s pollen
What this forecast doesn’t measure, and when to get help.
No mold level
Google’s index covers tree, grass and weed pollen only, so there is no mold level for San Antonio on this page. The National Allergy Bureau publishes pollen and mold counts measured at its stations. Our guides cover common molds such as Alternaria, Cladosporium and Aspergillus.
No indoor allergens
The forecast doesn’t cover allergens indoors either: dust mites, cockroaches, mice, cats and dogs. Our guides explain each one, starting with dust mites and cats.
Asthma in San Antonio
An estimated 9.1% of adults in the city of San Antonio have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 8.1% to 10.3%). It is a statistical estimate from national survey data, not a count.
Allergists in the San Antonio area
39 allergists enrolled in Medicare practice in the San Antonio area: 1.39 for every 100,000 people, more than the 1.22 across the US. The count doesn’t show how soon you can get an appointment. See the doctors listed in the San Antonio area, or how every state and metro compares.
AllergyNest count from CMS’s Doctors and Clinicians file (October 2026) and Census population estimates for 2025.
San Antonio’s pollen seasons
The geography, climate and plants behind each season here, with a source for every fact.
Three ecosystems meet within San Antonio: the Edwards Plateau, the Oak Woods and Tallgrass Prairie, and the Tamaulipan Thornscrub.2 The city lies on the upper edge of the Gulf Coastal Plain, where the Balcones Escarpment, a series of faults, separates it from the Edwards Plateau.2 Winters at the airport average about 54 °F, and a typical freeze-free season lasts about 277 days.1
Soils on the plateau are usually shallow and underlain by limestone.3 Texas Partners in Flight describes it as originally a grassy savannah whose most common trees were mesquite, juniper and live oak.4 Today the plateau holds grasslands, juniper and oak woodlands, and live oak or mesquite savannah.3 Ashe juniper is commonly found in Central Texas on the Edwards Plateau, and male trees can turn golden with pollen in winter.5
Sources
- U.S. Climate Normals 1991–2020: San Antonio International Airport (USW00012921). NOAA National Centers for Environmental Information. Read on October 15, 2026.
- Environmental Factors, San Antonio Missions National Historical Park. National Park Service. Read on October 15, 2026.
- Texas Ecoregions. Texas Parks and Wildlife Department. Read on October 15, 2026.
- Ecoregional Bird Checklists, Texas Partners in Flight. Texas Parks and Wildlife Department. Read on October 15, 2026.
- Ashe Juniper, Blueberry Juniper, Plants of Texas Rangelands. Texas A&M AgriLife Extension Service. Read on October 15, 2026.
Questions about pollen in San Antonio
Answered from the values on this page.
Is pollen high in San Antonio today?
No. The highest level in San Antonio today, Tuesday, November 3, is moderate (3 on the 0 to 5 index), led by ragweed. Weed pollen is moderate, tree pollen is very low and grass pollen is very low.
Which pollen is in the air in San Antonio today?
According to Google’s model: Ragweed (moderate), elm (very low) and grasses (very low). Plants Google doesn’t model, and mold, aren’t included.
Will pollen be higher tomorrow in San Antonio?
No. Google’s forecast for tomorrow, Wednesday, is moderate (3 on the 0 to 5 index), the same as today. Over the next four days, the highest forecast is moderate, on Wednesday.
Is this a pollen count?
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central San Antonio. A pollen count is the number of pollen grains measured in a cubic meter of air at a counting station. How our pollen index works.
When does this page update?
Twice a day. We fetch new values soon after midnight in San Antonio, so each day starts with its own values, and again after Google’s daily model run, usually by about 9:30 am CT. Each section shows when its values were retrieved.
How long has AllergyNest recorded pollen in San Antonio?
Since October 14, 2026. The year in pollen above fills in as each day is recorded, and weeks before then show no data. Google doesn’t provide past values, so nothing earlier can be added.
Source: Includes pollen data from GoogleIncludes data from Google Maps