Perth Amboy pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Perth Amboy is moderate; grass and ragweed are moderate; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains moderate, ragweed remains moderate, mugwort no longer expected.
7-Day Trend
Over the next week grass and mugwort will increase; ragweed will decrease.
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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) | Moderate | 36/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 2/100 |
| Ragweed (Ambrosia) | Moderate | 48/100 |
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) | Moderate | 30/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Moderate | 40/100 |
Local Environmental Conditions
Perth Amboy's Raritan Bay New Jersey coastal setting features oak, sweetgum, and maple as the main tree pollen sources, with exposure varying between the limited wooded residential areas and the more built-up commercial and industrial waterfront corridors along Smith Street. The Raritan Bay proximity creates distinct onshore-inland pollen gradients, while the Arthur Kill waterway creates a distinctive tidal estuary pollen environment and onshore bay breezes can periodically suppress local pollen dispersal throughout.
Perth Amboy's Raritan Bay coastal setting in New Jersey produces a season opening in late February with cedar and elm before oak peaks through April. Grass from surrounding New Jersey farmland peaks through June and July before mugwort and nettle extend exposure into September. The Raritan Bay position means onshore bay breezes can periodically suppress pollen dispersal, while the moderate mid-Atlantic climate advances the season compared to more northern cities.
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Frequently Asked Questions About Pollen in New Jersey
Is pollen high in Perth Amboy right now?
On 20 September 2026, overall pollen levels in Perth Amboy are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Perth Amboy tomorrow?
On 21 September 2026, pollen conditions in Perth Amboy will be different from today, with ambrosia at moderate levels, grass at moderate levels
Is pollen expected to decrease in Perth Amboy this week?
According to the five-day outlook, ambrosia pollen levels are expected to gradually decrease, while artemisia and grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Perth Amboy?
On 20 September 2026, Ambrosia is the dominant pollen source in Perth Amboy. grass and artemisia are also present but at lower levels.
When is pollen season in Perth Amboy?
How often is the Perth Amboy pollen forecast updated?
The Perth Amboy pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Perth Amboy 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 Perth Amboy 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 Perth Amboy, 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. |
Get More in the Airmine Pollen app
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).
