Costa da Caparica weather in September
September in Costa da Caparica: warm, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Costa da Caparica · #342 of 897 destinations to visit in September · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Costa da Caparica in September
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Costa da Caparica climate normals — September
| Daytime high | 24°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 18°C / 65°F | |
| Rainfall | 40 mm / 1.6 in | 🌦 some rain |
| Rainy days | 4 days | |
| Humidity | 79% | 💦 very humid |
| Dew point | 17°C / 62°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 12.4 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Costa da Caparica in September — FAQ
- Is September a good time to visit Costa da Caparica?
- September in Costa da Caparica: warm, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Costa da Caparica on SeasonMap's comfort score (86/100).
- What is the weather like in Costa da Caparica in September?
- In September, Costa da Caparica averages a daily high of 24.4°C and a low of 18.1°C, with about 40.3 mm of rain over roughly 4.4 rainy days.
- What is the air quality in Costa da Caparica in September?
- Costa da Caparica has a mean US Air Quality Index of about 38 in September.