Lisbon
Portugal
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Lisbon, Portugal

The beautiful hillside city of Lisbon in Portugal, with a high, far view of the Sao Jorge Castle
The beautiful hillside city of Lisbon in Portugal, with a high, far view of the Sao Jorge Castle
Almost anything done in Lisbon during August will be pleasurable. Visitors can enjoy sunbathing from a sun lounger or spend time enjoying a breath-taking panoramic view of the sunset as seen from Lisbon clifftops. The mean temperature is 22.8°C (73°F). There's practically no rain, and the sea waters are pleasant at 18.9°C (66°F).

What is the warmest month in Lisbon?

August is the warmest month in Lisbon, with an average high-temperature of 28.3°C (82.9°F) and an average low-temperature of 18.6°C (65.5°F).

What is the temperature in August in Lisbon?

The average high-temperature, in August, is 28.3°C (82.9°F), while the average low-temperature is 18.6°C (65.5°F).

How much does it rain in Lisbon in August?

In Lisbon, Portugal, in August, during 2 rainfall days, 6.2mm (0.2") of precipitation is typically accumulated.

What is the sea temperature in August in Lisbon?

In August, the average sea temperature in Lisbon 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).

What is the average length of the day in August in Lisbon?

In August, the average length of the day is 13.6h.

What are the months with the most sunshine in Lisbon?

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

How many hours of sunshine does Lisbon have in August?

In August, the average sunshine in Lisbon is 11h.

What is the UV index intensity in August in Lisbon?

The average daily maximum UV index in August in Lisbon, Portugal, is 8. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in August - Lisbon, Portugal
  • Average high temperature in August: 28.3°C

The warmest month (with the highest average high temperature) is August (28.3°C).
The month with the lowest average high temperature is January (14.8°C).

  • Average low temperature in August: 18.6°C

The month with the highest average low temperature is August (18.6°C).
The coldest month (with the lowest average low temperature) is January (8.3°C).

Average rainfall in August - Lisbon, Portugal
  • Average rainfall in August: 6.2mm

The wettest month (with the highest rainfall) is November (127.6mm).
The driest month (with the lowest rainfall) is July (4.2mm).

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

Months with the highest number of rainy days are January, February and December (14 days).
Months with the lowest number of rainy days are July and August (2 days).

Average sea temperature in August - Lisbon, 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).

Average daylight in August / Average sunshine in August - Lisbon, Portugal
  • Average daylight in August: 13.6h

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.5h).

  • Average sunshine in August: 11h

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

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

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