Forest pollen forecast - today, tomorrow and the week ahead

Today (16 July) pollen in Forest is low; grass is low. Tomorrow (17 July 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

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

Use our Strava plugin to check your own exposure.

Forest's parks and the Geleytsbeek corridor plane and linden are the leading pollen sources, with grass becoming significant from late spring onward. The Brussels-Capital Region farmland nearby and any local parks both shape how exposure varies across the area.

Today - 16 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

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    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 - 17 July

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    None

    0/100

Air quality in Forest

View air quality

Frequently Asked Questions

Is pollen high in Forest right now?

On 16 July 2026, overall pollen levels in Forest are low. Grass is the main contributor to airborne pollen

Will pollen levels change in Forest tomorrow?

On 17 July 2026, pollen conditions in Forest will be similar to today with no significant pollen expected.

Is pollen expected to decrease in Forest this week?

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

Which pollen types are currently active in Forest?

On 16 July 2026, Grass is the dominant pollen source in Forest. alder, artemisia, birch, hazel, cypress, and willow are not currently active.

When is pollen season in Forest?
Spring in Forest brings the sharpest pollen exposure, led by plane and linden after an early hazel and alder start; grass extends the season into summer, with the overall period running January through August. Calmer, drier days tend to let pollen linger longer here than in windier weather.
How often is the Forest pollen forecast updated?

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

Does pollen in Forest 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 Forest 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 Forest, 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 Belgium?

Check pollen in other popular cities:

Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Forest.

For long term forecasts and maps, see the Airmine app

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