7 of the most budget-friendly destinations in Europe
Discover Europe's top budget-friendly destinations including Budapest, Kotor, Krakow, and more, perfect for affordable and exciting travel.
Cascais Weather in August
August is one of the excellent months to visit Cascais, with daytime temperatures of 22°C (72°F) and lows of 18°C (64°F) at night. Rainfall is minimal, averaging just 5 mm (0.2 in) for the month.
Rainfall in Cascais in August
Expect around 2 days of rain based on historical data, with 5 mm (0.2 in) average. When rain does fall, showers tend to be light and brief. Most days will be dry.
Temperature in Cascais in August
August is one of the better months to visit Cascais. Expect 22°C (72°F) during the day and 18°C (64°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 18°C (64°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. On average, it has the peak temperatures of the year.
Sunshine in Cascais in August
The city usually sees around 355 hours of sunlight, indicating many sunny days , a great month for sightseeing.If your ideal day consists of dry skies and pleasant temperatures, June, July, August, September and October typically offer the best circumstances for Cascais.
Cascais Temperature in August
Min Temperature
18°C (64°F)
Max Temperature
22°C (72°F)
Chance of Rain
7%
Precipitation
5 mm (0.2 in)
Rainy days
2 days
Humidity
73%
Sunshine
355 hours
Percentage Sunshine
84%
Cascais Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Cascais - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cascais typically stay consistent throughout August, with daily highs averaging around 22°C (72°F). Nights are pleasant, with lows around 18°C (64°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather records for Cascais in August
Browse day-by-day weather records for Cascais spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cascais historical weather extremes in August
According to our 50 years of weather records for Cascais, the following extremes were recorded between 1976 and 2026.
- The lowest daytime temperature in August was 20°C (68°F), recorded on August 26, 1993.
- Cascais registered its coldest August night on August 13, 1983, with temperatures dropping to 11°C (52°F).
Best Places in Portugal in August
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in August →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Cascais in August
Pleasant temperatures in August mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. With minimal rainfall expected, you can leave the rain gear at home. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Cascais in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Cycling10/10 -
Walking10/10 -
Barbeque9/10 -
Camping10/10 -
Outdoor sports10/10
Cascais 3-Day Forecast
More climate data for Cascais
Temperature Rainfall Sunshine Humidity
See the full Cascais climate overview or explore weather in Portugal.
Popular in August
Where to go in August - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
7 of the most budget-friendly destinations in Europe
Warm Sea Without Extreme Heat: 8 Beach Destinations With Comfortable Weather
Love warm seawater but not extreme heat? Compare eight beach destinations where the sea stays warm while daytime temperatures remain comfortable.
Alentejo, where time stands still
The quiet region is known for its rolling green hills and it is a true hiking paradise. Architectural highlights can be found in the castles, ancient monasteries or when exploring the countless charming villages.
An eco-friendly guide to Lagos travel
Lagos, Portugal is a great place to visit while being careful about your environmental footprint. Here you find some tips about environmentally places to stay, where to eat and how to get around in the area.