VoyageCascais in September: weather & daylight
Room for an unhurried walk.
Regional averages help you choose a season. They are not a forecast for your travel dates. A wet day has at least 1 mm of precipitation, including rain or snow water equivalent.
Make room for the evening.
Local times for 2026-09-15 in Europe/Lisbon, including daylight saving. Estimates use the city center and a level horizon; hills and buildings can hide the sun earlier.
The year at a glance.
Average daily highs in °C. Select a month to open its guide.
| Month | High / low (°C) | Precipitation | Wet days |
|---|---|---|---|
| January | 15° / 11° | 65 mm | 10.2 |
| February | 15° / 11° | 51 mm | 8.9 |
| March | 16° / 12° | 60 mm | 9.9 |
| April | 17° / 13° | 54 mm | 8.9 |
| May | 19° / 15° | 31 mm | 6 |
| June | 21° / 17° | 11 mm | 2.6 |
| July | 23° / 18° | 3 mm | 0.9 |
| August | 23° / 18° | 6 mm | 1.2 |
| September | 23° / 18° | 25 mm | 4.5 |
| October | 21° / 17° | 80 mm | 10.5 |
| November | 17° / 14° | 92 mm | 12.7 |
| December | 15° / 12° | 65 mm | 9.8 |
A small packing note.
Comfortable shoes, a spare layer and light rain protection.
Boca do Inferno, Guincho and Cabo da Roca need their own distance and transport checks.
A seaside first chapter
Connect the town square, citadel and the exterior of the Castro Guimarães museum.
Open the walkNASA POWER / MERRA-2 · 2001–2020 · 0.5° latitude × 0.625° longitude regional grid. Values are computed from daily observations and model estimates. Mountain and coastal microclimates can differ substantially. Read the sources and method