Rockland, Maine pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Rockland, Maine is moderate; ragweed is moderate; grass and mugwort are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week grass, mugwort, and 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) | Low | 11/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 9/100 |
| Ragweed (Ambrosia) | Moderate | 47/100 |
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) | Low | 14/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 14/100 | |
| Ragweed (Ambrosia) | Moderate | 50/100 |
Local Environmental Conditions
Rockland's setting on a working harbor town on Penobscot Bay supports red spruce and balsam fir, paper birch, and coastal blueberry barrens as the leading local vegetation, all factoring into the pollen count through the year. Exposure varies with proximity to green space versus the more built-up parts of Rockland. As with most of the region, counts tend to build gradually rather than spike overnight.
The pollen calendar in Rockland opens with maple and elm starting March with birch and oak taking the lead through April and May. Grass pollen rises through June and July, and a modest weed pollen tail continues into September. Cold winters give way to a fast, concentrated spring pollen ramp-up across the region throughout the year.
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Frequently Asked Questions About Pollen in Maine
Is pollen high in Rockland, Maine right now?
On 20 September 2026, overall pollen levels in Rockland, Maine are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Rockland, Maine tomorrow?
On 21 September 2026, pollen conditions in Rockland, Maine will be similar to today, with ambrosia at moderate levels, artemisia at low levels, grass at low levels
Is pollen expected to decrease in Rockland, Maine this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Rockland, Maine?
On 20 September 2026, Ambrosia is the dominant pollen source in Rockland, Maine. artemisia and grass are also present but at lower levels.
When is pollen season in Rockland, Maine?
How often is the Rockland, Maine pollen forecast updated?
The Rockland, Maine pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Rockland, Maine 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 Rockland, Maine 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 Rockland, Maine, 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).
