Cascais weather in June
Temperature, sea and sunshine in June: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in June
Good
Best time to visit: June – September
What is the weather like in Cascais in June?
In June, Cascais is warm: daytime highs average 24 °C, and nights cool down to about 17 °C. The sea averages 17.8 °C – bracing, so a wetsuit helps for longer swims. With around 11 hours of sunshine a day, there is plenty of sun. Rain is rare: about 2 days bring 11 mm in total. All in all, June is a good month for a holiday in Cascais.
June compared
How the weather changes from May to July. Tap a month to open it.
More details for June
- Daylight
- 14 h 51 min06:12 – 21:03
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or more
- Wind
- 24 km/haverage daily peak
- Cloud cover
- 35 %on average
- Hot days
- 1 day30 °C or more
- Time zone
- UTC+1Europe/Lisbon
How the score comes together
- Temperatureweight 35 %77 %
- Seaweight 25 %11 %
- 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 June
- Wetsuit for longer swims
- Sunscreen
- Sunglasses & sun hat
Cascais in June: quick answers
Is Cascais hot in June?
Warm rather than hot: in June, daytime highs in Cascais average 24 °C and nights cool to about 17 °C. On about 1 days the thermometer climbs to 30 °C or more.
Can you swim in Cascais in June?
Only if you don't mind cold water: in June the sea averages just 17.8 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Cascais in June?
Rain is rare: about 2 days bring 11 mm in total.
Cascais month by month
The whole year in CascaisAll destinations: PortugalWhere to go in JuneSea temperature in June
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0)