San Antonio pollen forecast - today, tomorrow and the week ahead

Today (28 June) pollen in San Antonio is low; grass is low. Tomorrow (29 June 2026) levels are similar - grass remains low, cypress at low levels. Over the following five days cypress and grass will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

For long term forecasts and maps, see the Airmine app

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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

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 - 28 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    7/100

  • Willow (Salicaceae):

    None

    0/100

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 - 29 June

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    2/100

  • Grass (Poaceae):

    Low

    8/100

  • Willow (Salicaceae):

    None

    0/100

Air quality in San Antonio

View air quality

Pollen forecast for neighborhoods and landmarks in San Antonio

Alamo Heights Dignowity Hill Five Points San Antonio King William Historic District Lavaca Monte Vista Pearl District San Antonio River Walk San Antonio Museum of Art Six Flags Fiesta Texas Southtown San Antonio St. Paul Square The Alamo

Frequently Asked Questions

Is pollen high in San Antonio right now?

On 28 June 2026, overall pollen levels in San Antonio are low. Grass is the main contributor to airborne pollen

Will pollen levels change in San Antonio tomorrow?

On 29 June 2026, pollen conditions in San Antonio will be different from today, with 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, suggesting improving conditions later in the week.

Which pollen types are currently active in San Antonio?

On 28 June 2026, Grass is the dominant pollen source in San Antonio. hazel, cypress, and willow are not currently active.

When is pollen season in San Antonio?
San Antonio's pollen season opens with mountain cedar from December, making it one of the most intense early-season tree pollen cities in the US. Oak follows through March and April, with grass peaking through May and June. Ragweed extends the season into autumn. The flat to gently rolling Texas landscape allows pollen from surrounding Hill Country and prairie to disperse widely across the city under prevailing southerly winds.
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?

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Check pollen in other popular cities:

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Data provided by Airmine — Last update: 28 Jun 2026, 07:38 CET (Data is updated four times daily.)

This page provides the latest public pollen forecast for San Antonio.

For long term forecasts and maps, see the Airmine app

Download on the App Store Get it on Google Play

Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team

Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.