Cascais weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Good
Best time to visit: June – September
What is the weather like in Cascais in July?
In July, Cascais is warm: daytime highs average 26 °C, and nights cool down to about 18 °C. The sea averages 18.2 °C – bracing, so a wetsuit helps for longer swims. With around 12 hours of sunshine a day, there is plenty of sun. It hardly ever rains. All in all, July is a good month for a holiday in Cascais.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 38 min06:24 – 21:03
- UV index
- 10 · very highclear sky, noon (estimate)
- Muggy days
- 1 daydew point 18 °C or more
- Wind
- 25 km/haverage daily peak
- Cloud cover
- 24 %on average
- Hot days
- 2 days30 °C or more
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %17 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in July
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
Cascais in July: quick answers
Is Cascais hot in July?
Warm rather than hot: in July, daytime highs in Cascais average 26 °C and nights cool to about 18 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Cascais in July?
Only if you don't mind cold water: in July the sea averages just 18.2 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Cascais in July?
It hardly ever rains.
Cascais month by month
The whole year in CascaisAll destinations: Portugal
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)