Calais pollen forecast - today, tomorrow and the week ahead

Today (30 August) pollen in Calais is high; mugwort is high; grass is low. Tomorrow (31 August 2026) levels are similar - mugwort remains high. Over the following five days grass and mugwort will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.

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Calais' seafront green spaces and the Channel waterfront feature oak, birch, and alder as the main tree pollen sources, with exposure varying between these areas and the more built-up port city centre. Surrounding Nord-Pas-de-Calais farmland contributes substantial grass and crop pollen, while the exposed English Channel position means onshore winds frequently disperse pollen across the strait city throughout the season.

Today - 30 August

  • Alder (Alnus):

    None

    0/100

  • Birch (Betula):

    None

    0/100

  • Hazel (Corylus):

    None

    0/100

  • Cypress (Cupressaceae):

    None

    0/100

  • Grass (Poaceae):

    Low

    5/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    High

    70/100

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 - 31 August

  • 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):

    High

    64/100

Air quality in Calais

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Frequently Asked Questions

Is pollen high in Calais right now?

On 30 August 2026, overall pollen levels in Calais are high. Artemisia is the main contributor to airborne pollen, while grass remain at lower levels

Will pollen levels change in Calais tomorrow?

On 31 August 2026, pollen conditions in Calais will be different from today, with artemisia at high levels

Is pollen expected to decrease in Calais 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 Calais?

On 30 August 2026, Artemisia is the dominant pollen source in Calais. grass are also present but at lower levels. hazel, cypress, and willow are not currently active.

When is pollen season in Calais?
Calais' exposed English Channel position means strong onshore winds frequently disperse pollen across the strait city. Hazel and alder open from January before birch peaks through April, with oak and ash following through May. Grass from surrounding Nord farmland peaks through June and July, while the coastal position provides more frequent wind interruptions than in inland northern France throughout the season.
How often is the Calais pollen forecast updated?

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

Does pollen in Calais 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 Calais 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 Calais, 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 France?

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Check pollen in other popular cities:

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Data provided by Airmine — Last update: 30 August 2026 at 20:26 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Calais.

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Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.

Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.