Lorient pollen forecast - today, tomorrow and the week ahead

Today (25 June) pollen in Lorient is low; grass is low. Tomorrow (26 June 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

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

Lorient's Scorff and Blavet river corridors and estuarine green spaces feature oak, birch, and chestnut as the main tree pollen sources, with exposure varying between these areas and the more built-up port city centre. Surrounding Breton farmland and bocage woodland contribute substantial tree and grass pollen, while the Scorff estuary and Atlantic coastal position mean onshore winds can periodically disperse pollen across the naval port city.

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):

    Low

    1/100

  • 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):

    None

    0/100

  • Grass (Poaceae):

    None

    0/100

  • Willow (Salicaceae):

    None

    0/100

Frequently Asked Questions

Is pollen high in Lorient right now?

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

Will pollen levels change in Lorient tomorrow?

On 26 June 2026, pollen conditions in Lorient will be similar to today with no significant pollen expected.

Is pollen expected to decrease in Lorient this week?

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

Which pollen types are currently active in Lorient?

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

When is pollen season in Lorient?
Lorient's very wet Atlantic Breton climate means the pollen season is among the most frequently interrupted in France. Hazel and alder open from January before birch and oak peak through April and May. Grass from surrounding Breton farmland peaks through June and July, while the Scorff estuary position means onshore winds can additionally disperse pollen and very frequent Atlantic rainfall regularly interrupts exposure.
How often is the Lorient pollen forecast updated?

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

Does pollen in Lorient 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 Lorient 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 Lorient, 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?

Bordeaux Lille Lyon Marseille Montpellier Nantes Nice Paris Strasbourg Toulouse

Check pollen in other popular cities:

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

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 Lorient.

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.