Karlovac pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Karlovac is low; grass is low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass no longer expected.
7-Day Trend
Over the next week grass will increase; cypress, willow, and mugwort will remain stable.
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Features and forecast availability vary by region.
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) | None | 0/100 |
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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | |
| Mugwort (Artemisia) | None | 0/100 |
Local Environmental Conditions
As part of Karlovac, Karlovac lies where four rivers meet on the Croatian karst plain and sees plane and oak as its main tree pollen contributors; grass and coastal scrub pollen builds from the surrounding countryside as spring advances. The town's mix of open and built-up ground means exposure is rarely uniform across the area.
cypress and hazel gets the season underway in Karlovac, plane and oak carries the spring peak, and grass and coastal scrub pollen rounds things out into summer across the February-to-September window. Mediterranean-influenced summers keep late-season pollen modest here, consistent with the wider Karlovac pattern.
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Frequently Asked Questions About Pollen in Karlovac
Is pollen high in Karlovac right now?
On 20 September 2026, overall pollen levels in Karlovac are low. Grass is the main contributor to airborne pollen
Will pollen levels change in Karlovac tomorrow?
On 21 September 2026, pollen conditions in Karlovac will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Karlovac this week?
According to the five-day outlook, grass pollen levels will increase later in the week.
Which pollen types are currently active in Karlovac?
On 20 September 2026, Grass is the dominant pollen source in Karlovac. willow, artemisia, and cypress are not currently active.
When is pollen season in Karlovac?
How often is the Karlovac pollen forecast updated?
The Karlovac pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Karlovac 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 Karlovac 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 Karlovac, 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).
