Brentwood pollen forecast - today, tomorrow and the week ahead

Today (25 June) pollen in Brentwood is medium; grass is medium. Tomorrow (26 June 2026) levels are similar - grass increasing, cypress at medium 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

Brentwood's parks, including Weald Country Park, and the River Wid corridor feature oak and birch as the main tree pollen sources, with exposure varying between these extensive green areas and the more built-up town centre. Surrounding Essex farmland and the Thames-side woodland contribute substantial tree and grass pollen, while the dry Essex climate provides fewer rainfall interruptions than in northern and western UK throughout the season.

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):

    Medium

    42/100

  • 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):

    Medium

    29/100

  • Grass (Poaceae):

    High

    70/100

  • Willow (Salicaceae):

    None

    0/100

Frequently Asked Questions

Is pollen high in Brentwood right now?

On 25 June 2026, overall pollen levels in Brentwood are moderate. Grass is the main contributor to airborne pollen

Will pollen levels change in Brentwood tomorrow?

On 26 June 2026, pollen conditions in Brentwood will be different from today, with cypress at medium levels and grass increasing

Is pollen expected to decrease in Brentwood 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 Brentwood?

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

When is pollen season in Brentwood?
Brentwood's pollen season opens with hazel and alder from late January, earlier than in northern UK cities due to the mild Essex climate. Oak and birch follow through April and May, with grass peaking through June and July. Weald Country Park contributes substantial tree pollen during spring, while surrounding Essex farmland extends grass exposure into August and the dry Essex climate means fewer rainfall interruptions.
How often is the Brentwood pollen forecast updated?

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

Does pollen in Brentwood 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 Brentwood 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 Brentwood, 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 Kingdom?

Birmingham Bristol Glasgow Leeds Liverpool London Manchester Portsmouth Sheffield Southampton

Check pollen in other popular cities:

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Data provided by Airmine — Last update: 25 Jun 2026, 09:00 CET (Data is updated four times daily.)

This page provides the latest public pollen forecast for Brentwood.

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.