Saint-Nazaire pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Saint-Nazaire 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
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Saint-Nazaire's Loire estuary waterfront and surrounding green spaces feature oak, birch, and pine as the main tree pollen sources, with exposure varying between these areas and the more built-up port city centre. Surrounding Loire-Atlantique farmland and the Brière wetlands contribute substantial grass and reed pollen, while the Loire estuary position means onshore Atlantic winds can periodically disperse pollen across the industrial 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
9/100
-
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):
Low
8/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in Saint-Nazaire right now?
On 25 June 2026, overall pollen levels in Saint-Nazaire are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Saint-Nazaire tomorrow?
On 26 June 2026, pollen conditions in Saint-Nazaire will be similar to today, with grass at low levels
Is pollen expected to decrease in Saint-Nazaire this week?
According to the five-day outlook, grass and cypress pollen levels will increase later in the week.
Which pollen types are currently active in Saint-Nazaire?
On 25 June 2026, Grass is the dominant pollen source in Saint-Nazaire. willow, alder, birch, hazel, and cypress are not currently active.
When is pollen season in Saint-Nazaire?
How often is the Saint-Nazaire pollen forecast updated?
The Saint-Nazaire pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Saint-Nazaire 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 Saint-Nazaire 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 Saint-Nazaire, 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?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 25 Jun 2026, 09:01 CET (Data is updated four times daily.)
This page provides the latest public pollen forecast for Saint-Nazaire.
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
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.