August weather forecast
Cascais, Portugal

Weather in August

The last month of the summer, August, is also a moderately hot month in Cascais, Portugal, with temperature in the range of an average low of 17°C (62.6°F) and an average high of 27°C (80.6°F).

Temperature

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

Rainfall

In August, the rain falls for 2 days. Throughout August, 8mm (0.31") of precipitation is accumulated. In Cascais, during the entire year, the rain falls for 116 days and collects up to 841mm (33.11") of precipitation.

Sea temperature

In August, the average sea temperature in Cascais is 19.6°C (67.3°F).
Note: For most, swimming in 19.6°C (67.3°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In August, the average length of the day is 13h and 38min.
On the first day of the month, sunrise is at 06:39 and sunset at 20:48. On the last day of August, sunrise is at 07:05 and sunset at 20:10 WEST.

Sunshine

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

UV index

The average daily maximum UV index in August is 8. A UV Index reading of 8 to 10 represents a very high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 8 in August transform into the following instructions:
Take extra precautions. Protection against sun damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Cascais?

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

How much does it rain in Cascais in August?

In Cascais, Portugal, in August, during 2 rainfall days, 8mm (0.31") of precipitation is typically accumulated.

What is the sea water temperature in August in Cascais?

In Cascais, Portugal, the average seawater temperature in August is 19.6°C (67.3°F). Swimming in 19.6°C (67.3°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Cascais have in August?

In August, the average day length in Cascais is 13h and 38min.

What time are sunrise and sunset in August in Cascais?

In August, on the first day of the month, sunrise is at 06:39 and sunset at 20:48. On the last day of the month, in Cascais, Portugal, sunrise is at 07:05 and sunset at 20:10 WEST.

What are the months with the most sunshine in Cascais?

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

How long on average sun shines in August in Cascais?

In Cascais, the average sunshine duration in August is 11h.

What is the UV index reading in August in Cascais?

In August, the average daily maximum UV index in Cascais, Portugal, is 8. A UV Index estimate of 8 to 10 represents a very high health threat from exposure to the Sun's UV radiation.

Average temperature in August
Cascais, Portugal

Average temperature in August - Cascais, Portugal
  • Average high temperature in August: 27°C

The warmest month (with the highest average high temperature) is August (27°C).
The month with the lowest average high temperature is January (14°C).

  • Average low temperature in August: 17°C

The months with the highest average low temperature are July, August and September (17°C).
The coldest month (with the lowest average low temperature) is January (8°C).

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Average rainfall in August
Cascais, Portugal

Average rainfall in August - Cascais, Portugal
  • Average rainfall in August: 8mm

The wettest month (with the highest rainfall) is January (123mm).
The driest month (with the least rainfall) is July (7mm).

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Average rainfall days in August
Cascais, Portugal

Average rainfall days in August - Cascais, Portugal
  • Average rainfall days in August: 2 days

The month with the highest number of rainy days is January (15 days).
The months with the least rainy days are July and August (2 days).

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Average sea temperature in August
Cascais, Portugal

Average sea temperature in August - Cascais, Portugal
  • Average sea temperature in August: 19.6°C

The best month for swimming (with the highest average sea temperature) is September (19.9°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).

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Average daylight in August /
Average sunshine in August
Cascais, Portugal

Average daylight in August / Average sunshine in August - Cascais, Portugal
  • Average daylight in August: 13h and 38min

The month with the longest days is June (Average daylight: 14h and 50min).
The month with the shortest days is December (Average daylight: 9h and 31min).

  • Average sunshine in August: 11h

The months with the most sunshine are July and August (Average sunshine: 11h).
The months with the least sunshine are January, February, November and December (Average sunshine: 5).

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Average UV index in August
Cascais, Portugal

Average UV index in August - Cascais, Portugal
  • Average UV index in August: 8

The months with the highest UV index are June and July (UV index 9).
The months with the lowest UV index are January and December (UV index 2).

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