Forecast

Birch pollen is still number one in the pollen spectrum!

Even if precipitation is still expected in western Austria during the first half of the week, which will dampen the pollen count somewhat, intensive pollen counts must still be expected in the rest of the country. From Wednesday onwards, the weather situation seems to be improving again across the whole country, which means that intense allergic reactions can be expected in all parts of the country.

Birch pollen continues to be the main allergen in the ambient air. Although the peak pollution phase has already been passed in the lowlands of eastern Austria, the pollution levels remain high. In the rest of the country, the pollution peak can probably be expected this week. As the birch has an above-average density of catkins this year, it can be assumed that the loads will remain at a high to very high level for some time to come.

In addition to birch, other representatives of the birch family such as hornbeam or hop hornbeam release pollen and can cause additional stress through cross-reactions, as the allergens of these plants are structurally very similar to those of birch.

Caution: Increased desert dust concentrations in the air are to be expected, especially at the beginning of the week. This can further irritate the airways and exacerbate allergic symptoms.

The ash pollen season is already slowly coming to an end in the east of Austria, while in the west it may continue to cause moderate to high levels of exposure.

In urban areas, there is also a risk of exposure due to the plane tree blossom can be expected. Particularly along avenues of plane trees, intense pollution can occur in some areas.

In some thermally favoured locations, the first grasses in bloom. These are very localised occurrences that can currently only cause low levels of exposure in the immediate vicinity. The forecast data for the grass pollen season currently indicate that the grasses will be ready to flower at the beginning of May. These data are still subject to major uncertainties at the beginning of the season and will become more precise over time.

In addition to the pollen types mentioned above, maple, yew, oak, poplar, sour grasses and cypress plants are represented in the pollen spectrum. However, they only have a very low allergenic potential.

Forecast date: 2026-04-13

Note: The data shown here are model data for the expected start of flowering. For more detailed information on the expected pollen count, please refer to the text forecasts.