Karratha pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Karratha is moderate; cypress is moderate; acacia and grass are low.
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week acacia and grass will increase; cypress will decrease; eucalyptus will remain stable.
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Pollen Risk
Today - 20 September
| Pollen species | Level | Value |
|---|---|---|
| Acacia (Acacia) | Low | 7/100 |
| Cypress (Cupressaceae) | Moderate | 36/100 |
| Eucalyptus (Myrtaceae) | None | 0/100 |
| Grass (Poaceae) | Low | 8/100 |
Tomorrow - 21 September
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Acacia (Acacia) | Low | 2/100 | |
| Cypress (Cupressaceae) | Moderate | 32/100 | |
| Eucalyptus (Myrtaceae) | None | 0/100 | |
| Grass (Poaceae) | Low | 4/100 |
Local Environmental Conditions
The Karratha area sits amid spinifex hummock grassland and low acacia scrub typical of the Pilbara, with mangroves and salt-tolerant coastal vegetation fringing the nearby tidal creeks and harbour. Mulga occurs further inland. This is rugged, red-earth country with sparse tree cover overall, and little of the dense forest or grassland pollen load found in temperate Australian cities.
Karratha, on the Pilbara coast, has a pollen pattern shaped by its hot, dry, semi-arid climate rather than a classic four-season cycle. Native acacias, spinifex and coastal shrubs tend to flower opportunistically following the region's irregular rains, which can fall in the cyclone-influenced wet months (roughly November to April) as well as sporadically at other times. Pollen output is generally low, with short bursts of activity after rain and long quiet stretches during the frequent dry periods.
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Frequently Asked Questions About Pollen in Western Australia
Is pollen high in Karratha right now?
On 20 September 2026, overall pollen levels in Karratha are moderate. Cypress is the main contributor to airborne pollen, while acacia and grass remain at lower levels
Will pollen levels change in Karratha tomorrow?
On 21 September 2026, pollen conditions in Karratha will be similar to today, with acacia at low levels, cypress at moderate levels, grass at low levels
Is pollen expected to decrease in Karratha this week?
According to the five-day outlook, cypress pollen levels are expected to gradually decrease, while acacia and grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Karratha?
On 20 September 2026, Cypress is the dominant pollen source in Karratha. acacia and grass are also present but at lower levels. myrtle are not currently active.
When is pollen season in Karratha?
How often is the Karratha pollen forecast updated?
The Karratha pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Karratha 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 Karratha 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 Karratha, 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).
