Lake Arrowhead pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Lake Arrowhead is medium; grass and ragweed are medium; cypress is low. Tomorrow (17 July 2026) levels are similar - grass declining, ragweed declining. Over the following five days cypress, grass, and ragweed 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

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Lake Arrowhead's setting on a mountain lake community above 5,100 feet in the San Bernardinos supports Jeffrey and ponderosa pine, black oak, and incense cedar as the leading local vegetation, all factoring into the pollen count through the year. Exposure varies with proximity to green space versus the more built-up parts of Lake Arrowhead. As with most of the region, counts tend to build gradually rather than spike overnight.

Today - 16 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    Low

    24/100

  • Grass (Poaceae):

    Medium

    30/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Medium

    27/100

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 - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    6/100

  • Oak (Quercus):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

  • Ragweed (Ambrosia):

    Low

    4/100

Air quality in Lake Arrowhead

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Frequently Asked Questions

Is pollen high in Lake Arrowhead right now?

On 16 July 2026, overall pollen levels in Lake Arrowhead are moderate. Grass is the main contributor to airborne pollen, while ambrosia and cypress remain at lower levels

Will pollen levels change in Lake Arrowhead tomorrow?

On 17 July 2026, pollen conditions in Lake Arrowhead will be different from today, with grass, ambrosia continuing to decline

Is pollen expected to decrease in Lake Arrowhead this week?

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

Which pollen types are currently active in Lake Arrowhead?

On 16 July 2026, Grass is the dominant pollen source in Lake Arrowhead. ambrosia and cypress are also present but at lower levels. oak, willow, alder, artemisia, and birch are not currently active.

When is pollen season in Lake Arrowhead?
Lake Arrowhead's tree pollen season begins with olive and acacia from January before eucalyptus takes over and peaks through February. A grass pollen peak follows through March and April; sagebrush and mugwort extend exposure into early autumn. The Southern California Mediterranean climate advances the season, and onshore Pacific breezes can periodically disperse pollen, shaping conditions across the city.
How often is the Lake Arrowhead pollen forecast updated?

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

Does pollen in Lake Arrowhead 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 Lake Arrowhead 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 Lake Arrowhead, 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.

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Data provided by Airmine — Last update: 16 July 2026 at 05:36 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Lake Arrowhead.

For long term forecasts and maps, see the Airmine app

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