SeasonMapCascais weather in April
Portugal
April in Cascais: nice, a little rain, with clean air — a great time to visit.
#7 of 12 months in Cascais · #702 of 1383 destinations to visit in April · comfort 78/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Cascais in April
Other months in Cascais
Cascais's forum calls July hot and sunny but not especially humid, typically mid-20s to low-30s°C with a regular Atlantic breeze that helps take the edge off. Regulars flag the sea itself as genuinely cold year-round despite the warm air, and note evenings can turn cool enough for a light jacket even after a hot day.
Add your own note from Cascais's card on the map.
Cascais climate normals — April
| Daytime high | 19°C / 66°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 55°F | |
| Feels like (high) | 18°C / 64°F | |
| Sea temperature | 16°C / 61°F | 🧊 bracing |
| Rainfall | 59 mm / 2.3 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 11 h/day | |
| Daylight | 13.2 h | |
| Wind | 23 km/h / 15 mph | |
| Air quality (US AQI) | 46 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Cascais in April
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyEaster holidays in Portugal, school holidays in 6 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Cascais's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherCascais's best weather comes in June, July and September — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Cascais — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Cascais?
Cascais in April — FAQ
- Is April a good time to visit Cascais?
- April in Cascais: nice, a little rain, with clean air — a great time to visit. It ranks #7 of 12 months for Cascais on SeasonMap's comfort score (78/100).
- What is the weather like in Cascais in April?
- In April, Cascais averages a daily high of 19.1°C and a low of 12.9°C, with about 58.5 mm of rain over roughly 10.5 rainy days.
- What is the air quality in Cascais in April?
- Cascais has a mean US Air Quality Index of about 46 in April.
Other months in Cascais
Compare Cascais in April
Warmer or cooler than Cascais in April
Similar destinations in Southern Europe — April
Within 300 km: Évora's Alentejo spring around 1 Mar – 30 Apr, and Lagos' Dolphins offshore around 1 Apr – 31 Oct.