Norrtälje pollen forecast - today, tomorrow and the week ahead

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

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Norrtälje's tree pollen comes mainly from pine, birch, and oak growing in parks and along residential streets rather than the compact centre. Farmland close to the Roslagen archipelago adds a steady stream of grass and crop pollen through the growing season. Local tourism and forestry does not add materially to vegetation-related pollen, which instead reflects the surrounding rural landscape.

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

    12/100

  • Willow (Salicaceae):

    None

    0/100

  • Mugwort (Artemisia):

    Moderate

    44/100

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):

    Moderate

    28/100

Air quality in Norrtälje

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Frequently Asked Questions

Is pollen high in Norrtälje right now?

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

Will pollen levels change in Norrtälje tomorrow?

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

Is pollen expected to decrease in Norrtälje this week?

According to the five-day outlook, artemisia pollen levels are expected to gradually decrease, while grass pollen will increase, suggesting mixed conditions later in the week.

Which pollen types are currently active in Norrtälje?

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

When is pollen season in Norrtälje?
The pollen calendar in Norrtälje starts in February with alder, followed by a strong birch peak in May. Grass takes over from birch through the summer months of June and July. The character of the Roslagen archipelago nearby gives Norrtälje a somewhat variable day-to-day pollen pattern tied to local wind shifts. Tourism and forestry in the area matters little for pollen; it is the pine forest and farmland belt that extends the season.
How often is the Norrtälje pollen forecast updated?

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

Does pollen in Norrtälje 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 Norrtälje 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 Norrtälje, 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 Sweden?

Borås Gothenburg Helsingborg Linköping Malmö Norrköping Örebro Stockholm Uppsala Västerås

Check pollen in other popular cities:

Melton Rio de Janeiro Copenhagen Athens Denpasar Rome Cape Town Barcelona London Los Angeles New York

Data provided by Airmine — Last update: 30 August 2026 at 14:32 CEST (Data is updated four times daily.)

This page provides the latest public pollen forecast for Norrtälje.

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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.