Forecast

Grass pollen counts are expected to rise over the long weekend!

The weather forecast promises plenty of sunshine and early summer temperatures across the country over the coming days. This will have a very positive effect on the pollen count, meaning that allergy sufferers can expect intense pollen counts. Fortunately, the birch blossom in the lowlands and valleys is already largely complete and the grass pollen season grass pollen season is only just beginning. Despite the weather, no peak pollen levels need be expected.

The situation is different at higher altitudes. Here, birch pollen can still lead to high levels of pollution. Under suitable wind conditions, relevant amounts of pollen can also be transported to lower altitudes.

Since beech trees, oaks, hornbeamsandhop hornbeamsare still widely in bloom, cross-reactions can lead to an additional intensification of exposure.

In the lowlands and valleys as well as on sun-exposed slopes, grass pollen counts are expected to rise in the coming days. In many places it will remain at a low level, but in thermally favoured locations there may already be moderate levels. The main culprits for the contamination are currently the early flowering grass species, including meadow grass, switch grass, tufted grass and foxtail grass. However, it will be some time before the grasses start to flower across the board.

The white flakes in the air are the seeds and seed hairs of the poplar. Their flight usually coincides with the start of grass flowering, but unlike grass pollen, they cannot cause allergic symptoms.

Note: At the moment, a yellowish film of dust can be found on car roofs or window sills. This is pollen from conifers such as spruce, pine and fir trees. From an allergological point of view, it is not relevant. However, as this pollen is present in high concentrations in the ambient air, it can cause mechanical irritation of the conjunctiva and respiratory tract.

The plane tree blossom is already dying down in most parts of the country. However, allergy sufferers should continue to avoid the vicinity of plane tree avenues.

People who are sensitised to olive tree pollen should continue to expect symptoms in the coming days due to the blossoming of the manna ashbut also to lilacs in the immediate vicinity.

In rural areas, rape fields are in bloom. To avoid possible symptoms, pollen allergy sufferers should avoid being near these fields.

In addition to the pollen types mentioned maple, dock, umbellifers, ginkgo, mulberry, horse chestnut, sour grasses, walnut and cypress plants are represented in the pollen spectrum. However, they only have a very low allergenic potential.

Forecast date: 2026-04-30

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.