August Weather in Cascais, Portugal

Last updated: February 24, 2025

Experience the charm of Cascais, Portugal in August, where the weather is pleasantly warm, with maximum temperatures reaching 23°C (74°F) and an average of 18°C (65°F). This coastal gem enjoys a mild minimum temperature of 16°C (61°F), making it perfect for both daytime exploration and evening strolls. With only 4 mm (0.1 in) of rain over just one day, visitors can savor plenty of sunshine. The 60% humidity adds a refreshing coastal breeze, enhancing the delightful summer atmosphere. Embrace the beauty of Cascais this August, where ideal weather awaits!

August Temperature in Cascais

August in Cascais, Portugal, offers a delightful summer experience characterized by mild temperatures that strike a perfect balance between warmth and comfort. With minimums resting at 16°C (61°F) and averages around 18°C (65°F), the month welcomes visitors to enjoy the pleasant climate. The maximum temperatures reach a comfortable 23°C (74°F), making it ideal for sun-soaked beach days and outdoor explorations. Compared to the preceding months, August showcases a gradual rise in temperatures, peaking in warmth and creating a vibrant atmosphere in this coastal paradise. As summer wanes, the weather remains inviting, ensuring that the allure of Cascais shines bright well into the season.

August Weather in Cascais: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Cascais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec555657586163646465646058
Data source: Temperature data for Cascais generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Cascais

In August, Cascais, Portugal experiences a significant reduction in precipitation, receiving only 4 mm (0.1 in) of rain over just one day. This marks a continuation of the dry spell that begins in July, where rainfall dwindles to a mere 3 mm. The summer months showcase a striking contrast to the earlier part of the year, wherein January to April see more robust rainfall totals, peaking in November with 89 mm (3.5 in). As summer progresses, the region enjoys extended periods of sunshine, making August one of the driest months, ideal for beachgoers and outdoor enthusiasts alike. This dramatic drop in moisture highlights the seasonal variations that define Cascais' Mediterranean climate, providing a refreshing retreat during the hottest summer days.

August Precipitation Trends in Cascais

The chart displays monthly precipitation patterns in Cascais, with values for each month alongside August's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec4259647133123432538973
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Cascais

In Cascais, Portugal, August marks a continuation of the summer trend with a humidity level of 60%, matching July's comfortable feel. As the warmer months arrive, humidity shows a steady decline from a high of 85% in January to a more moderate 60% in both July and August. This dip not only enhances outdoor activities along the stunning coastline but also signifies a shift from the muggy winter months. As September approaches, humidity levels start to rise again, reaching 67%, hinting at a gradual change as autumn brings more moisture. Overall, August stands out for its pleasant and inviting atmosphere, making it a perfect time to enjoy everything Cascais has to offer.

August Average Humidity in Cascais

This chart illustrates the average monthly humidity levels in Cascais, with August's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how August's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec85%75%72%70%70%63%60%60%68%74%83%85%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Cascais

August in Cascais, Portugal, showcases a UV Index of 9, categorizing the exposure level as very high, with a burn time of just 15 minutes. This reflects a slight decrease from the peak UV Index of 11 in June but still indicates the need for caution. As summer progresses, UV levels generally remain elevated, with July also recording a UV Index of 10. The trend through these warmer months underscores the importance of protective measures against sun exposure, especially as the UV Index remains significantly high. As you enjoy the stunning beaches and outdoor activities, be mindful of the sun’s intensity and prioritize sun safety. For detailed information, visit Cascais UV Index.

Maximum UV Index Levels in Cascais for August

The chart shows the monthly maximum UV Index (UVI) for Cascais in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Cascais August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

August Sunshine in Cascais

In Cascais, Portugal, August basks in the glow of approximately 395 hours of sunshine, marking a noteworthy peak in a summer filled with brilliant days. As the year unfolds, sunshine slowly begins to increase from a modest 183 hours in January, steadily climbing through the spring and reaching its zenith in July with an impressive 420 hours. Although August sees a slight dip, it maintains a robust count, ensuring warm, sun-kissed days for beachgoers and locals alike. This trend of abundant sunshine continues into September, gently tapering off to 348 hours as autumn approaches, setting the stage for a seasonal transition while still preserving the allure of sunny days in this picturesque coastal town.

Monthly Sunshine Duration in Cascais: August Highlighted

The August sunshine duration represents the total number of hours Cascais experiences direct sunlight during the month of August, excluding cloudy or obstructed periods. This chart compares the sunshine duration of August with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec183h231h307h351h405h409h420h395h348h313h236h224h
Data source: Cascais August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Cascais During August

August in Cascais, Portugal, boasts a promising 66% chance of sunny weather, making it one of the ideal months for sun-seekers. The trend of increasing likelihood of sunshine begins in March and peaks in July, with August maintaining a robust chance of clear skies. Following the summer months, September also stands at a favorable 66%, suggesting that the warmth continues even as summer fades. This consistency in sunny days positions August as a prime time to enjoy the stunning beaches and vibrant culture of Cascais, alongside the delightful Mediterranean climate that lingers well into early autumn.

Percentage of Sunny Days in August in Cascais

The chart illustrates the percentage of sunny days in Cascais throughout the year, with August highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Cascais experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec45%24%60%41%57%65%69%66%66%55%65%39%
Data source: Cascais August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Cascais in August

In August, Cascais, Portugal enjoys about 13 hours of daylight, slightly tapering off from the peak summer months of June and July, which each bask in an equal 14 hours. This gradual decline signals the transition towards autumn, as daylight hours gracefully shift from July’s summer zenith. Following a vibrant July, August still offers plenty of sun, perfect for enjoying the stunning beaches and outdoor activities. The trend here showcases a steady increase in daylight from January's mere 9 hours, reaching its height in the middle of summer, before slowly descending as the year progresses. Overall, August serves as a delightful reminder of the lingering summer days while hinting at the cozy embrace of fall.

Average Daylight Hours in Cascais for August

The chart illustrates the variation in daylight duration in Cascais throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 46m10h 44m11h 58m13h 14m14h 17m14h 49m14h 32m13h 36m12h 23m11h 8m10h 2m9h 28m
Data source: Cascais daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Cascais

In Cascais, Portugal, the August wind whispers at an average speed of 6.4 m/s (14 mph), marking a gentle breeze that invites both relaxation and adventure along the coast. This month slightly dips from the more robust winds of late spring and summer, where June and July consistently boast speeds of 7.3 m/s (16 mph). Interestingly, while summer winds are typically lively, there's a gradual decline into autumn, as evidenced by September's further drop to 5.4 m/s (12 mph). Overall, August becomes a sweet spot where the vibrant summer winds soften, providing a welcoming atmosphere for beachgoers and sailors alike, ready to savor the tail end of the summer season before the winds calm even more in the coming months.

Average August Wind Speed in Cascais

The chart displays monthly wind speed patterns in Cascais, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.96.96.04.97.37.37.26.4 m/s5.45.16.56.7
Data source: Cascais August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Cascais Compares to Other Months

The weather in Cascais changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Cascais and find detailed weather information for every month.

In comparing the weather of August and January, August tends to be much warmer and drier. With minimum temperatures around 16°C (61°F) and maximums reaching up to 23°C (74°F), it offers a pleasant average of 18°C (65°F), accompanied by low precipitation of only 4 mm (0.1 in) over just one day. In contrast, January experiences significantly cooler temperatures, with minima dropping to 7°C (45°F) and a maximum of 18°C (64°F), leading to an average temperature of 13°C (56°F). Additionally, January is wetter, with 42 mm (1.7 in) of precipitation spread across about seven days and higher humidity at 85%. For more detailed information on January weather, you can check Cascais weather in January.

August and February present stark contrasts in weather patterns. In August, temperatures range from a minimum of 16°C (61°F) to a pleasant maximum of 23°C (74°F), accompanied by low precipitation of just 4 mm (0.1 in) over a single day, and average humidity levels around 60%. In contrast, February experiences cooler temperatures, with a minimum of 9°C (48°F) and a maximum of 17°C (63°F), along with significantly higher precipitation of 59 mm (2.3 in) spread across eight days and higher humidity at 75%. For a more detailed look at February's weather, visit Cascais weather in February.

In August, the weather tends to be warmer and drier, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F) and only 4 mm of precipitation over one day. The humidity hovers around 60%, making it feel quite comfortable. In contrast, March is noticeably cooler, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 19°C (66°F). This month experiences significantly more rainfall, with 64 mm spread over eight days, resulting in a higher humidity level of 72%. For more details on March weather, you can check out Cascais weather in March.

When comparing the weather in August and April, notable differences emerge. August tends to be warmer, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F), while April is cooler, with average temperatures between 10°C (50°F) and 21°C (71°F). Additionally, April sees significantly more precipitation, receiving 71 mm (2.8 in) across about 11 days, compared to August's mere 4 mm (0.1 in) over just one day. Humidity levels are also higher in April at 70%, compared to August's 60%. For those interested in more detailed information, visit Cascais weather in April.

When comparing the weather in August and May, there are notable differences in temperature and precipitation. August experiences milder temperatures with a minimum of 16°C (61°F), an average of 18°C (65°F), and a maximum of 23°C (74°F), accompanied by relatively low precipitation of only 4 mm over 1 day and 60% humidity. In contrast, May is warmer with a maximum temperature of 24°C (76°F) but a lower minimum of 11°C (53°F) and an average of 16°C (61°F). May also sees significantly higher rainfall, with 33 mm over 3 days and a higher humidity level of 70%. For more detailed insights, you can refer to Cascais weather in May.

In August, the weather in Cascais tends to be slightly warmer compared to June, with average temperatures reaching around 18°C (65°F) and maximums hitting 23°C (74°F). In contrast, June has a lower average temperature of 17°C (63°F) and maximums of 22°C (72°F). While both months experience relatively low precipitation, August sees just 4 mm (0.1 in) over a single day, compared to June's 12 mm (0.5 in) spread over two days. Additionally, humidity levels remain comparable, with August at 60% and June slightly higher at 63%. For more detailed information, you can check out Cascais weather in June.

In comparing the weather between July and August, we see that both months share similar minimum temperatures, with July slightly cooler at a minimum of 16°C (60°F) compared to August's 16°C (61°F). Both months average around 18°C, but August reaches a higher maximum temperature of 23°C (74°F), while July tops out at 21°C (70°F). Precipitation levels are quite low in both months, with August receiving just 4 mm over a day, compared to July's 3 mm with no recorded rainy days. Humidity remains consistent at 60% for both months, contributing to a comfortable summer feel. For further details, you can check Cascais weather in July.

In August, the weather tends to be slightly warmer with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F) and an average of 18°C (65°F). This month experiences minimal precipitation, with only 4 mm (0.1 in) falling over just one day, and humidity levels around 60%.

In contrast, September sees a similar temperature range with minimums of 15°C (60°F) and maximums of 23°C (74°F), maintaining the same average of 18°C (65°F). However, it experiences a significant increase in rainfall with 32 mm (1.2 in) over two days, and humidity rises to 67%. For more detailed information, you can check out Cascais weather in September.

In August, the weather tends to be milder with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F), accompanied by low precipitation of just 4 mm (0.1 in) over 1 day and humidity at 60%. In contrast, October brings a notable increase in precipitation, totaling 53 mm (2.1 in) across 6 days, along with cooler temperatures that drop to a minimum of 11°C (52°F), while the average remains steady at 18°C (64°F) and the maximum still reaches 23°C (74°F). The humidity also rises to 74%, making October feel more humid and damp. For more detailed insights, check out Cascais weather in October.

August weather in Cascais is generally mild and pleasant, with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F). Precipitation is minimal, with only about 4 mm (0.1 in) falling over just one day, and humidity sits comfortably at 60%. In contrast, November sees a noticeable drop in temperatures, with averages between 11°C (53°F) and 20°C (68°F). The month is much wetter, receiving about 89 mm (3.5 in) of rain over 11 days, leading to higher humidity levels of 83%. For a detailed look at what to expect, check out Cascais weather in November.

The weather in August is generally mild and pleasant, with temperatures ranging from a minimum of 16°C (61°F) to a maximum of 23°C (74°F), and low precipitation at just 4 mm (0.1 in) over the course of a single day. In contrast, December sees cooler temperatures, with averages dropping to a minimum of 9°C (49°F) and a maximum of 17°C (63°F). Additionally, December experiences significantly higher precipitation, totaling 73 mm (2.9 in) across about 10 days, along with increased humidity at 85%. For more details, you can check Cascais weather in December.

Compare Cascais's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Cascais

In August, Cascais enjoys delightful weather characterized by mild temperatures and low precipitation, marking a distinct departure from the chillier and wetter months earlier in the year. With maximums reaching a pleasant 23°C (74°F), the climate invites outdoor activities while maintaining an average of 18°C (65°F) for comfortable evenings. Unlike the previous months that often see more rain and higher humidity, August feels drier with only about 4 mm of rain on just a single day, allowing for ample sunshine and pleasant beach time. This makes it a perfect month to explore the beauty of Cascais, especially for those seeking a delightful blend of warmth and minimal rain. For an in-depth look at how this vibrant coastal town's climate changes throughout the year, check out Cascais Climate.