Ostend pollen forecast - today, tomorrow and the week ahead
Today (25 June) pollen in Ostend is medium; grass is medium; cypress is low. Tomorrow (26 June 2026) levels are similar - cypress remains low, grass increasing. Over the following five days cypress will increase; grass will decrease. 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
Ostend's coastal parks and the North Sea waterfront feature oak, birch, and alder as the main tree pollen sources, with exposure varying between these green areas and the more built-up resort and port city centre. Surrounding West Flanders farmland contributes substantial grass and crop pollen, while the exposed North Sea coastal position means strong onshore winds frequently disperse pollen across the seafront city.
Today - 25 June
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
2/100
-
Grass (Poaceae):
Medium
50/100
-
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):
Low
3/100
-
Grass (Poaceae):
High
51/100
-
Willow (Salicaceae):
None
0/100
Frequently Asked Questions
Is pollen high in Ostend right now?
On 25 June 2026, overall pollen levels in Ostend are moderate. Grass is the main contributor to airborne pollen, while cypress remain at lower levels
Will pollen levels change in Ostend tomorrow?
On 26 June 2026, pollen conditions in Ostend will be different from today, with cypress at low levels and grass increasing
Is pollen expected to decrease in Ostend this week?
According to the five-day outlook, grass pollen levels are expected to gradually decrease, while cypress pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Ostend?
On 25 June 2026, Grass is the dominant pollen source in Ostend. cypress are also present but at lower levels. alder, birch, hazel, and willow are not currently active.
When is pollen season in Ostend?
How often is the Ostend pollen forecast updated?
The Ostend pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Ostend 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 Ostend 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 Ostend, 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 Belgium?
Check pollen in other popular cities:
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 Ostend.
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.