Castres pollen forecast - today, tomorrow and the week ahead
Today (20 July) pollen in Castres is low; grass is low. Tomorrow (21 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.
Castres's tree cover, concentrated in parks and along the Aude, is dominated by plane and oak. Surrounding Languedoc vineyards and Pyrenean farmland contribute substantial grass and scrub pollen, with the Mediterranean-continental climate influencing the intensity and timing of exposure.
Today - 20 July
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
15/100
-
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 - 21 July
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
3/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
None
0/100
Air quality in Castres
View air qualitySports venues in Castres
Frequently Asked Questions
Is pollen high in Castres right now?
On 20 July 2026, overall pollen levels in Castres are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Castres tomorrow?
On 21 July 2026, pollen conditions in Castres will be similar to today, with grass at low levels
Is pollen expected to decrease in Castres 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 Castres?
On 20 July 2026, Grass is the dominant pollen source in Castres. willow, alder, artemisia, birch, hazel, and cypress are not currently active.
When is pollen season in Castres?
How often is the Castres pollen forecast updated?
The Castres pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Castres 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 Castres 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 Castres, 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: 20 July 2026 at 16:32 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Castres.
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.