Weather in Cascais for August 2026
The forecast for the next days in Cascais predicts temperatures to be around 24 °C, close to the historical average.
In general, the average temperature in Cascais at the beginning of August is 23.9 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 21.4 °C by the end of August.
Precipitation in Cascais during August is a rare event, with an average of fewer than 2 rainy days.
Is August a good time to visit Cascais? check out the best time to travel to Cascais page.
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Cascais Weather August
Temperatures trend during August in Cascais
August weather in Cascais day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. |  Sunny | 24° /18° | 0 mm | 8 | |
| 2 Aug. |  Patchy rain possible | 23° /18° | 0 mm | 7 | |
| 3 Aug. | Sunny | 23° /18° | 0.8 mm | 7 | |
| 4 Aug. | Sunny | 24° /18° | 0.2 mm | 7 | |
| 5 Aug. | Sunny | 25° /19° | 0 mm | 8 | |
| 6 Aug. | Patchy rain possible | 24° /18° | 0.1 mm | 6 | |
| 7 Aug. | Sunny | 24° /20° | 0 mm | 8.3 | |
| 8 Aug. | Sunny | 24° /20° | 0 mm | 7.9 | |
| 9 Aug. | Sunny | 23° /20° | 0 mm | 8.1 | |
| 10 Aug. | Sunny | 23° /20° | 0 mm | 8.3 | |
| 11 Aug. | Sunny | 23° /20° | 0 mm | 8.5 | |
| 12 Aug. | Sunny | 24° /20° | 0 mm | 6 | |
| 13 Aug. | Sunny | 25° /20° | 0 mm | 6 | |
| 14 Aug. | Sunny | 24° /20° | 0 mm | 6 | |
| 15 Aug. | Sunny | 23° /20° | 0 mm | 6 | |
| 16 Aug. |  Partly cloudy | 23° /20° | 0 mm | 6 | |
| 17 Aug. | Sunny | 22° /20° | 0.1 mm | 6 | |
| 18 Aug. | Sunny | 23° /19° | 0 mm | 6 | |
| 19 Aug. | Sunny | 24° /20° | 0 mm | 6 | |
| 20 Aug. | Sunny | 24° /20° | 0 mm | 6 | |
| 21 Aug. | Sunny | 23° /18° | 0 mm | 6 | |
| 22 Aug. | Patchy rain possible | 24° /18° | 0 mm | 6 | |
| 23 Aug. | Sunny | 24° /18° | 0 mm | 6 | |
| 24 Aug. | Sunny | 24° /18° | 0 mm | 6 | |
| 25 Aug. | Sunny | 22° /17° | 0 mm | 6 | |
| 26 Aug. | Partly cloudy | 22° /17° | 0 mm | 6 | |
| 27 Aug. | Sunny | 22° /17° | 0 mm | 6 | |
| 28 Aug. | Sunny | 21° /17° | 0 mm | 6 | |
| 29 Aug. | Sunny | 21° /18° | 0 mm | 5 | |
| 30 Aug. | Sunny | 21° /18° | 0 mm | 6 | |
| 31 Aug. | Patchy rain possible | 21° /18° | 0.1 mm | 5 | |
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Cascais weather in August vs July vs September
| July | August | September | |
|---|---|---|---|
| Weather | Sunny | Sunny | Sunny |
| Temperatures | 23°/18° | 23°/18° | 21°/17° |
| Rainfall | 2 mm | 0 mm | 22 mm |
| Wind | 28.6 km/h | 30 km/h | 26.6 km/h |
| Humidity | 78% | 79% | 76% |
| Rainy days | 1 days | 0 days | 8 days |
| Dry days | 30 days | 31 days | 22 days |
Planning a trip to Cascais? Discover the best time to visit
Cascais in August - FAQ
What are the expected maximum and minimum temperatures in Cascais during August?
How much rainfall should be expected in Cascais during August?
What are the typical wind conditions in Cascais during August?
Cascais water temperatures in August
The average water temperature of the Atlantic Ocean near Cascais in August is 17.5 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Cascais in August?
- The average water temperature in Cascais in August is 17.5 °C.
- Can you swim in Cascais in August?
- Brisk: quick dips and active swimming are fine, but pack a 2–3 mm spring suit if you plan longer sessions or early-morning outings.
UV exposure in Cascais during August
What to pack to Cascais in August?
Mild · highs around 23 °C, mostly dry
As you prepare for your trip to Cascais in August, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Cascais, during August, is comfortable and enjoyable, regardless of the weather conditions.
🧥 Clothing
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Where is Cascais?Get accurate weather forecasts for Cascais, located at latitude 38.697 and longitude -9.421. Stay updated with localized weather information tailored for Cascais.