August weather forecast
Cascais, Portugal

August continues the summer season in Cascais, albeit with slightly more balanced weather conditions than July. With just 8mm (0.31") of rainfall observed, the dry and sunny climate remains untamed, providing a stable atmosphere. The city, indulging in long daylight hours, encourages extended outdoor leisure activities. As August concludes, September introduces a subtle change, bringing in slightly cooler air and an incremental rise in rainfall.

Temperature

August is the warmest month in Cascais, Portugal, with an average high-temperature of 27°C (80.6°F) and an average low-temperature of 17°C (62.6°F).

Rainfall

In Cascais, in August, during 2 rainfall days, 8mm (0.31") of precipitation is typically accumulated. Throughout the year, there are 116 rainfall days, and 841mm (33.11") of precipitation is accumulated.

Sea temperature

In Cascais, the average seawater temperature in August is 19.6°C (67.3°F).
Note: Most people find it challenging to enjoy swimming in water that is 19.6°C (67.3°F). As water temperature falls below 21°C (69.8°F), controlling breathing grows increasingly difficult.

Daylight

In Cascais, the average length of the day in August is 13h and 38min.
On the first day of August, sunrise is at 06:39 and sunset at 20:48. On the last day of the month, sunrise is at 07:06 and sunset at 20:09 WEST.

Sunshine

The months with the most sunshine in Cascais are July and August, with an average of 11h of sunshine.

UV index

In August, the average daily maximum UV index in Cascais, Portugal, is 8. A UV Index of 8 to 10 symbolizes a very high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In August, an average UV index of 8 transforms into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.