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PortugalThe weather in August in Lisbon
It's warm in August in Lisbon with an average temperature of 29°C. Temperatures this month range from a low of 27°C to a high of 31°C. At night, you can expect temperatures between 18°C and 20°C.
Looking for great weather? August is a good time to be in Lisbon. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in August for Lisbon, Portugal. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 43°C in 2018, Lisbon reached the highest temperature in August over the past 10 years. The lowest daytime temperature in this month was 22°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 15°C to a highest value of 30°C.
Water temperature
The water temperature at Lisbon is 23°C this month. Comfortable for a swim.
Rainfall amount
According to weather history, there is only 3,4 mm of precipitation in August. The wind speed is around 4 Bft, mostly coming from the Northwest.
Daily weather in August for Lisbon
Click on any day in August to get detailed info about the usual weather on that day in Lisbon. Check out the historical temperatures and precipitation over the past 10 years on this day.
August weather comparison
| Lisbon | New York | |
|---|---|---|
| Average temperature | 29°C | 30°C |
| Max. temperature | 31°C | 31°C |
| Min. temperature | 18°C | -5°C |
| Total precipitation | 3,4 mm | 79 mm |
| Rainy days | 1 day | 13 days |
Start of August
The month of August starts in Lisbon with hot temps, averaging around 30°C during the day and nights around 20°C.
Mid August
By mid-August, daytime temps stay steady at around 30°C, with nights around 19°C. No precipitation expected during this period, so you can enjoy plenty of sunshine.
End of August
By the end of August, the average daytime temperature in Lisbon is around 29°C, while nighttime temps are about 19°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Lisbon for all months and discover the best travel time
Curious about the weather in other parts of Portugal? Check out the climate and weather for spots like Algarve, Albufeira, Madeira, or explore other destinations in Portugal.
Temperature charts
These charts show the average temperatures in August in Lisbon, Portugal. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in August in Lisbon
Temperature in August in Lisbon over the years
Precipitation charts
These charts show the average amount of precipitation in August in Lisbon, Portugal. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in August in Lisbon
Total precipitation in August in Lisbon over the years
Daily UV index in August in Lisbon
This chart shows the average daily UV index in August in Lisbon, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in August in Lisbon
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Average weather in Lisbon by month
Click on a month below to see detailed weather info for Lisbon. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.