01Weather
Lisbon weather in August
Afternoons in August average 29.1 °C (84 °F) and nights cool to 19.1 °C (66 °F). The month brings about 4 mm (0.2 in) of rain spread over roughly 1 days. Compared with July it is 0.8 °C warmer; September is 2.4 °C cooler again.
What the averages hide
| In a typical August | Value | What it means |
|---|---|---|
| Warm afternoons (90th percentile) | 34 °C / 93 °F | one day in ten is at least this warm |
| Cool afternoons (10th percentile) | 25 °C / 77 °F | one day in ten stays below this |
| Cold nights (10th percentile) | 17 °C / 63 °F | one night in ten is colder than this |
| Days above 30 °C (86 °F) | 10.6 | per month, average 2016–2025 |
| Nights at or below 0 °C (32 °F) | 0.0 | frost mornings per month |
| Chance of rain on any given day | 3 % | at least 1 mm |
| Hottest / coldest August day 2016–2025 | 42.0 °C / 16.0 °C | extremes in the ten-year record |
02Daylight
Sunrise, sunset and the length of the day
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 August | 06:38 | 20:47 | 14.2 h |
| 15 August | 06:50 | 20:31 | 13.7 h |
| 31 August | 07:04 | 20:08 | 13.1 h |
Daylight shrinks by about 66 minutes over the month. Times are local (Europe/Lisbon).
03Crowds
How busy Lisbon is in August
very busy The main sights are very busy in August. What drives it:
- Assumption on 15 August
- many locals away
- peak international visitors
04Public holidays
Public holidays in August 2027
| Date | Holiday |
|---|---|
| 15 Aug 2027 | Assumption Day |
On public holidays many shops close and museums run on Sunday hours; check opening times for the day before and after as well.
05Events
What's on in Lisbon in August
Every year in August
| Event | When | Type |
|---|---|---|
| Jazz em Agosto | August, Gulbenkian | music |
07Packing
What to pack for Lisbon in August
- light, breathable clothing
- sun hat and sunscreen
- refillable water bottle
- something for heat: 11 days a month pass 30 °C on average
08Editor's notes
What the numbers don't tell you
August is the hottest month, with afternoons around 28 °C, Assumption on 15 August a holiday and many Lisboetas away, so some neighbourhood restaurants close for two or three weeks. International crowds are at their peak. Jazz em Agosto at the Gulbenkian garden offers cool evenings. The sea is at its warmest, around 20 °C. Rain is rare, about one day.
The Sintra palaces and the Belém monuments run at capacity between ten and four. The Alfama fado houses are busy but open. The Carcavelos and Guincho beaches are full at weekends. Daylight shrinks from fourteen hours to thirteen. For the warm sea and the fado festival with lower prices, see September.
09Compare
Lisbon month by month
| Month | High | Low | Rain days | Sun h | Crowds | Verdict |
|---|---|---|---|---|---|---|
| January | 16 °C | 9 °C | 9 | – | quiet | Good |
| February | 17 °C | 10 °C | 10 | – | quiet | Good |
| March | 18 °C | 11 °C | 8 | – | moderate | Excellent |
| April | 21 °C | 13 °C | 9 | – | busy | Excellent |
| May | 24 °C | 15 °C | 4 | – | busy | Excellent |
| June | 26 °C | 17 °C | 3 | – | very busy | Good |
| July | 28 °C | 19 °C | 0 | – | very busy | Good |
| August | 29 °C | 19 °C | 1 | – | very busy | Good |
| September | 27 °C | 18 °C | 4 | – | busy | Excellent |
| October | 24 °C | 17 °C | 8 | – | busy | Excellent |
| November | 18 °C | 13 °C | 10 | – | moderate | Excellent |
| December | 16 °C | 10 °C | 9 | – | moderate | Good |
Not sure about August? See the best time to visit Lisbon.
10Elsewhere
August in nearby cities
| City | High | Rain days |
|---|---|---|
| Barcelona in August | 30 °C | 4 |
| Paris in August | 25 °C | 10 |
| London in August | 22 °C | 8 |
| Dublin in August | 20 °C | 14 |
| Rome in August | 32 °C | 2 |
| Amsterdam in August | 23 °C | 12 |
11FAQ
Lisbon in August: your questions
Is August a good time to visit Lisbon?
August is a good month to visit Lisbon. Daytime highs average 29 °C (84 °F), rain falls on about 1 days, and hotel arrivals run above the yearly average, so the main sights are very busy.
What is the weather like in Lisbon in August?
Expect warm days around 29 °C (84 °F) and nights near 19 °C (66 °F). One August in ten brings afternoons above 34 °C, and one in ten stays below 25 °C.
Does it rain a lot in Lisbon in August?
August brings about 4 mm (0.2 in) of rain over roughly 1 days, which is dry by Lisbon standards. On any given day the chance of at least 1 mm of rain is 3 percent.
What should I wear in Lisbon in August?
Pack light, breathable clothing, sun hat and sunscreen, refillable water bottle.
Is Lisbon crowded in August?
The main sights are very busy in August. Main drivers: Assumption on 15 August; many locals away; peak international visitors.
What time does it get dark in Lisbon in August?
Around the middle of August the sun sets at about 20:31 and rises at 06:50, giving 13.7 hours of daylight.