Rehoboth Beach Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Rehoboth Beach is moderate; grass, ragweed, and mold (cladosporium) are moderate; mugwort and mold (alternaria) are low.
Pollen Tomorrow
Tomorrow (11 October 2026) grass remains moderate, mugwort remains low, ragweed remains moderate, mold (alternaria) remains low, mold (cladosporium) declining.
7-Day Trend
Over the next week mold (alternaria) and mold (cladosporium) will increase; grass, mugwort, and ragweed will decrease.
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Pollen Risk
Today - 10 October
| 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 | 28/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 3/100 |
| Ragweed (Ambrosia) | Moderate | 28/100 |
| Mold (Alternaria) | Low | 22/100 |
| Mold (Cladosporium) | Moderate | 28/100 |
Tomorrow - 11 October
| 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 | 36/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 12/100 | |
| Ragweed (Ambrosia) | Moderate | 36/100 | |
| Mold (Alternaria) | Low | 12/100 | |
| Mold (Cladosporium) | Low | 18/100 |
Local Environmental Conditions
Open water makes up around 46% of the area near Rehoboth Beach, with a good deal of built-up land and some woodland. Among allergenic trees in the wider area, oak leads, followed by juniper. Grasses, mugwort and pigweed growing in the surroundings are the main non-tree sources of pollen. Local vegetation is sparse, so most pollen arrives on the wind from surrounding land.
Oak and juniper lead the season in mid-spring, as temperatures climb to around 10°C, and tree pollen reaches its peak. Grasses take over in late spring, with temperatures around 15°C, and their pollen lingers into early fall. Later, mugwort and pigweed keep weed pollen in the air from midsummer into early fall. In warm, humid weather from late spring into mid-fall, mold spores add to the mix, especially after rain.
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Frequently Asked Questions About Pollen in Delaware
Is pollen high in Rehoboth Beach right now?
On 10 October 2026, overall pollen levels in Rehoboth Beach are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Rehoboth Beach tomorrow?
On 11 October 2026, pollen conditions in Rehoboth Beach will be similar to today, with ambrosia at moderate levels, artemisia at low levels, grass at moderate levels
Is pollen expected to decrease in Rehoboth Beach 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 Rehoboth Beach?
On 10 October 2026, Ambrosia is the dominant pollen source in Rehoboth Beach. grass and artemisia are also present but at lower levels.
When is pollen season in Rehoboth Beach?
How often is the Rehoboth Beach pollen forecast updated?
The Rehoboth Beach pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Rehoboth Beach 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 Rehoboth Beach 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 Rehoboth Beach, 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 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
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).
