Marietta, Georgia pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Marietta, Georgia is high; ragweed is high; grass is moderate.
Pollen Tomorrow
Tomorrow (21 September 2026) grass remains moderate, ragweed remains high, mugwort at low levels.
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) | Moderate | 31/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | High | 60/100 |
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 | 45/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 11/100 | |
| Ragweed (Ambrosia) | High | 70/100 |
Local Environmental Conditions
Marietta's Cobb County Georgia suburban setting features loblolly pine, white oak, and maple as the main tree pollen sources, with exposure varying between the wooded Kennesaw Mountain National Battlefield and the more built-up commercial corridors along the Marietta Square area. Kennesaw Mountain is a particularly significant local tree pollen source, creating distinct pollen gradients between the forested mountain slopes and the more open commercial and residential valley areas below.
Marietta's Atlanta suburban setting produces a season opening in late January with cedar and pine before oak peaks through March and April. Grass from surrounding Georgia Piedmont farmland peaks through April and May before mugwort and nettle extend exposure into September. The Chattahoochee River corridor channels airflows, while the warm Southeast climate and the Atlanta urban heat island advance the season throughout.
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Frequently Asked Questions About Pollen in Georgia
Is pollen high in Marietta, Georgia right now?
On 20 September 2026, overall pollen levels in Marietta, Georgia are high. Ambrosia is the main contributor to airborne pollen, while grass remain at lower levels
Will pollen levels change in Marietta, Georgia tomorrow?
On 21 September 2026, pollen conditions in Marietta, Georgia will be different from today, with artemisia at low levels, grass at moderate levels, ambrosia at high levels
Is pollen expected to decrease in Marietta, Georgia this week?
According to the five-day outlook, artemisia, grass, and ambrosia pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.
Which pollen types are currently active in Marietta, Georgia?
On 20 September 2026, Ambrosia is the dominant pollen source in Marietta, Georgia. grass are also present but at lower levels. artemisia are not currently active.
When is pollen season in Marietta, Georgia?
How often is the Marietta, Georgia pollen forecast updated?
The Marietta, Georgia pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Marietta, Georgia 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 Marietta, Georgia 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 Marietta, Georgia, 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).
