Pollen Count in Cascais
- Loading..
- Loading..
- Loading..
- Loading..
Morning Alerts ☀️. Start Your Day Prepared! 🌿 Sign up for daily morning high pollen count alerts.
Cascais, Portugal has different pollen seasons. Trees, grasses, and weeds release pollen. This happens at different times of the year. Spring is a big time for pollen.
Updated: 4/20/2026
In February and March, olive trees release a lot of pollen. This is because they are trying to make seeds. Many people stay inside when this happens.
Grasses release pollen in May and June. This is when the weather gets warmer. People who spend time outside notice more pollen in the air.
Weeds release pollen in late summer and early fall. This can make it hard for people to enjoy the outdoors. Pollen counts are usually lower in winter months.
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 Cascais 🌾. 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 | 0.3 | 0 | 0 | 0 | 0 | 0 |
| Feb | 2.1 | 0 | 0.2 | 0 | 0 | 0 |
| Mar | 1.7 | 12.2 | 5.6 | 0 | 0 | 0 |
| Apr | 0.2 | 3.3 | 44.7 | 0 | 171.7 | 0 |
| May | 0 | 1.1 | 113.2 | 0 | 120.8 | 0 |
| Jun | 0 | 0 | 63.9 | 0 | 2.7 | 0 |
| Jul | 0 | 0 | 31.4 | 0 | 0.2 | 0 |
| Aug | 0 | 0 | 8.6 | 0 | 0 | 0 |
| Sep | 0 | 0 | 1.2 | 0 | 0 | 0 |
| Oct | 0 | 0 | 0.6 | 0 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(8 km)