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

Today (25 June) pollen in San Rafael is low; grass is low. Tomorrow (26 June 2026) levels are similar. Over the following five days grass will increase. 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 Rafael's Marin County California bay-to-ridge setting features California bay laurel, coast live oak, and eucalyptus as the main tree pollen sources, with exposure varying between the wooded San Rafael Hill and Terra Linda ridges and the more built-up downtown and North San Rafael commercial corridors. The San Rafael Creek corridor provides locally significant green space, while the mountain-to-bay elevation gradient creates distinct pollen zones between the forested ridges and the bay waterfront below.

Today - 25 June

  • 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

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 - 26 June

  • 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

Frequently Asked Questions

Is pollen high in San Rafael right now?

On 25 June 2026, overall pollen levels in San Rafael are low. Grass is the main contributor to airborne pollen

Will pollen levels change in San Rafael tomorrow?

On 26 June 2026, pollen conditions in San Rafael will be similar to today, with grass at low levels

Is pollen expected to decrease in San Rafael this week?

According to the five-day outlook, grass pollen levels will increase later in the week.

Which pollen types are currently active in San Rafael?

On 25 June 2026, Grass is the dominant pollen source in San Rafael. willow, hazel, and cypress are not currently active.

When is pollen season in San Rafael?
San Rafael's Marin County California setting produces a season opening in January with oak and olive before grass from surrounding Marin County land peaks through April and May. Mugwort extends exposure into September, while the bay proximity moderates temperatures and the Marin hills concentrate pollen under certain wind conditions. The Golden Gate gap channels strong Pacific marine breezes that can rapidly disperse pollen.
How often is the San Rafael pollen forecast updated?

The San Rafael pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Does pollen in San Rafael 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 Rafael 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 Rafael, 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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Data provided by Airmine — Last update: 25 Jun 2026, 09:02 CET (Data is updated four times daily.)

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

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.