Skjærhalden pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Skjærhalden is none
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, grass, willow, and mugwort will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| 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) | None | 0/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| 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) | None | 0/100 |
Local Environmental Conditions
Skjærhalden is a small Østfold coastal village in Hvaler municipality on the outermost Oslofjord island archipelago where birch, hazel, and coastal scrubland are the main local pollen sources. The Oslofjord outer island position means onshore winds can frequently disperse pollen, while the mild coastal Østfold climate advances the season slightly and birch peaks through April and May before grass contributes through June and July and mugwort extends into September.
Across Skjærhalden, the pollen season runs its course from February to August, with alder and hazel arriving first from about February, with birch building to the season's sharpest peak running through May. Grass pollen picks up next and holds through June and July. With the mild, productive lowlands surrounding Skjærhalden, the local climate leaves its own mark on how the pollen season actually unfolds locally.
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Frequently Asked Questions About Pollen in Østfold
Is pollen high in Skjærhalden right now?
Currently, there is no significant pollen in Skjærhalden.
Will pollen levels change in Skjærhalden tomorrow?
On 21 September 2026, pollen conditions in Skjærhalden will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Skjærhalden this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Skjærhalden?
On 20 September 2026, there are no significant pollen types in Skjærhalden.
When is pollen season in Skjærhalden?
How often is the Skjærhalden pollen forecast updated?
The Skjærhalden pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Skjærhalden 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 Skjærhalden 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 Skjærhalden, 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.
Understanding the Scale
The 0–100 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
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Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
