PortugalAverage weather for Lisbon in August
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.
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. There’s little chance of precipitation. The weather’s mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers.
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.
Since it cools down at night, it’s a good idea to wear layers.
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.
Because temperatures drop in the evening, wearing layers is recommended.
Water temperature
The water temperature at Lisbon is 23°C this month. Comfortable for a swim.
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.
Lisbon in August |
New York | ||
|---|---|---|---|
 Average temperature |
29°C | 30°C | |
 Max. temperature |
31°C | 31°C | |
| Min. temperature |
27°C | -5°C | |
 Total precipitation |
3,4 mm | 79 mm | |
| Rainy days |
1 day | 13 days | |
July
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.
Is August a good time to visit Lisbon?
Looking for great weather? August is a good time to be in Lisbon. The temperatures are nice, and there’s not too much rain.
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.
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.
Daily Temperature in August in Lisbon
This chart shows the average daily high and low temperatures in August for Lisbon, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in August in Lisbon
The chart below shows the average daily precipitation in August for Lisbon, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for August, you can expect about 1 day of precipitation in Lisbon.
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.
Temperature in August in Lisbon over the years
This chart shows the average temperature in August in Lisbon, measured in degrees Celsius, over the past few years.
Total precipitation in August in Lisbon over the years
This chart shows the average precipitation in August in Lisbon, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
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.
