Pollen Count in Donostia / San Sebastian
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Donostia has a lot of trees, grasses, and plants. They make pollen. Pollen is in the air. It's more in some months.
Updated: 4/20/2026
February to April is bad. Trees like oak and beech make a lot of pollen. It's also a problem for people who like to play outside.
May and June are grass pollen months. Grasses make a lot of pollen. It's a problem for people who like to play football or run outside.
July and August are better. There's less pollen. People can enjoy the beach and parks more. But some plants still make pollen.
Pollen Forecast Chart
Recommendations
When pollen concentrations reach a peak, we suggest these simple steps to help with hay fever. These tips are extra important on windy days when plants are in peak anthesis (the time when they release the most pollen).
- Wear masks if necessary
- Shower after going out
- Wear sunglasses if windy
- Close windows and doors
- Use an indoor air purifier
- Avoid wearing woolen clothes outside
- Limit outdoor activities
Annual Pollen Overview
Check out this month-by-month overview of the daily average pollen count in Donostia / San Sebastian 🌾. This data is based on previous years and serves as a guideline to help you understand when different pollen seasons typically occur in your city.
| Alder | Birch | Grass | Mugwort | Olive | Ragweed | |
|---|---|---|---|---|---|---|
| Jan | 1.1 | 0 | 0 | 0 | 0 | 0 |
| Feb | 174.5 | 0 | 0.3 | 0 | 0 | 0 |
| Mar | 287.8 | 51.3 | 3.6 | 0 | 0 | 0 |
| Apr | 24.7 | 107.1 | 26.8 | 0 | 0.7 | 0 |
| May | 1 | 6.4 | 137.9 | 0 | 40.6 | 0 |
| Jun | 0.2 | 0.3 | 216.2 | 0 | 13 | 0 |
| Jul | 0 | 0 | 68.2 | 1.4 | 0.2 | 0 |
| Aug | 0 | 0 | 28.2 | 4.6 | 0 | 1.2 |
| Sep | 0 | 0 | 6 | 7.1 | 0 | 2.4 |
| Oct | 0 | 0 | 1.9 | 2.7 | 0 | 0 |
| Nov | 0 | 0 | 0.3 | 1.1 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |