Lisbon Weather in August
Lisbon in August sees high daytime temperatures of 27°C (81°F) and nighttime lows of 18°C (64°F). With just 5.7 mm (0.2 in) of rainfall expected, it's a dry month overall.
Rainfall in Lisbon in August
You can expect rain on roughly 2 days based on historical data, averaging 5.7 mm (0.2 in) for the month. On the rare occasion it rains this month, it usually amounts to very little.
Temperature in Lisbon in August
August is a good time to be in Lisbon. Days are perfect, reaching 27°C (81°F), with nights around 18°C (64°F). August is typically considered a summer month. Overall, the month follows a fairly predictable daily temperature pattern. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions. On average, it is the warmest month of the year.
Sunshine in Lisbon in August
The month enjoys around 350 hours of sunshine, creating mostly sunny days with good weather conditions.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Lisbon's climate page.
Lisbon Temperature in August
Min Temperature
18°C (64°F)
Max Temperature
27°C (81°F)
Chance of Rain
6%
Precipitation
5.7 mm (0.2 in)
Rainy days
2 days
Sunshine
350 hours
Percentage Sunshine
82%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Lisbon typically stay consistent throughout August, with daily highs averaging around 27°C (81°F). Nights are pleasant, with lows around 18°C (64°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Lisbon in August
Browse day-by-day weather records for Lisbon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Lisbon historical weather extremes in August
Based on weather observations in Lisbon between 1976 and 2025, these are the recorded extremes during August.
- The hottest August day on record in Lisbon reached 43°C (109°F) (August 4, 2018).
- Lisbon experienced its chilliest August day on August 26, 1993, reaching only 20°C (68°F).
- The lowest overnight temperature recorded in August was 11°C (52°F) (August 13, 1983).
Best Places in Portugal in August
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Lisbon in August
Warm weather calls for comfortable, breathable clothing in August. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Lisbon in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Portugal, check out our Lisbon's climate page.
See the full Lisbon climate overview or explore weather in Portugal.
