Pollen Count in Carcavelos
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In Carcavelos, Portugal, trees start producing pollen in January. This is the start of pollen season. It lasts until the end of March.
Updated: 2/22/2026
In April, grasses start to produce pollen. This is different from tree pollen. It lasts until the end of June, when grasses stop producing pollen.
In July, weeds start producing pollen. This lasts until the end of September, when weeds stop producing pollen.
In October, November, and December, there is very little pollen in the air. This is the quietest time for 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 Carcavelos 🌾. 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 | 2 | 0 | 0 | 0 | 0 | 0 |
| Feb | 1.7 | 0 | 0.7 | 0 | 0 | 0 |
| Mar | 0 | 5.1 | 8.3 | 0 | 0 | 0 |
| Apr | 0 | 8.3 | 95.3 | 0 | 161.6 | 0 |
| May | 0 | 0.6 | 183 | 0 | 211.3 | 0 |
| Jun | 0 | 0.1 | 104 | 0 | 8.3 | 0 |
| Jul | 0 | 0 | 33.6 | 0 | 0.4 | 0 |
| Aug | 0 | 0 | 9 | 0.1 | 0 | 0 |
| Sep | 0 | 0 | 2.5 | 0 | 0 | 0.4 |
| Oct | 0 | 0 | 0 | 0.2 | 0 | 0 |
| Nov | 0 | 0 | 0 | 0.5 | 0 | 0 |
| Dec | 0 | 0 | 0 | 0 | 0 | 0 |
(10 km)