Late summer · Weather & things to do
Lisbon in August
Lisbon's warmest month brings highs averaging 73°F (23°C), lows of 64°F (18°C) and about 0.2 in (6 mm) of rain.
At 88/100 for comfort (2nd of 12), it's one of the best months to visit.
- Avg high
- 73°F (23°C)
- Avg low
- 64°F (18°C)
- Rain
- 0.2 in (6 mm)
- Humidity
- 81%
- Cloud cover
- 41%
- Daylight
- ~13 h 31 min
- Comfort score
- 88/100 · Great
What August feels like
Highs settle around 73°F (23°C), warm enough for short sleeves.
Lows average 64°F (18°C).
Humidity averages 81%, so the air feels sticky and the heat feels stronger than the thermometer says.
Rain is scarce: about 0.2 in (6 mm) for the whole month.
Plan around August
August is one of Lisbon's best months on the climate data.
- Humidity season begins: 81% on average, up from 81% in July.
- Comfort holds steady from July (87 → 88/100).
- Our Portugal by Rail route recommends Apr – Jun, so August falls outside its suggested window.
What to pack for August
- Light, breathable clotheshighs average 73°F
- Sunscreen, sunglasses and a hathigh UV on clear days
- Quick-dry fabrics81% average humidity
- Comfortable walking shoesmost picks involve some walking
What to do in Lisbon in August
With conditions on your side, the picks below favor time outside.
Tram 28
Vintage yellow tram climbing through Graça, Alfama and Baixa.
Pena Palace
Romantic hilltop palace in bright colors above Sintra, 40 minutes by train.
Jerónimos Monastery
Manueline monastery with a carved cloister and Vasco da Gama's tomb.
Cervejaria Ramiro
Bustling seafood beer hall famous for garlic prawns and a steak sandwich to finish.
Miradouro da Senhora do Monte
The city's highest viewpoint, looking over the castle and river.
Why now August scores 88/100 for comfort, good conditions for being outside.
Nearby in August
- Coimbra in August~109 mi · highs 92°F, 0.6 in rain · 11°C (19°F) warmer by day, about as wet
- Porto in August~170 mi · highs 76°F, 0.9 in rain · 2°C (3°F) warmer by day, wetter
- Seville in August~195 mi · highs 101°F, 0.1 in rain · 15°C (28°F) warmer by day, about as wet
- Córdoba in August~243 mi · highs 101°F, 0.3 in rain · 15°C (28°F) warmer by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Lisbon in August: quick answers
Is August a good time to visit Lisbon?
Yes. On the climate data it's one of the best months, scoring 88/100. Expect highs of 73°F (23°C) and 0.2 in (6 mm) of rain. Our Portugal by Rail route recommends Apr – Jun, so August is outside its suggested window.
How hot is Lisbon in August?
Average highs are 73°F (23°C) and average lows 64°F (18°C), making it the warmest month by daytime highs.
Does it rain a lot in Lisbon in August?
Not much: about 0.2 in (6 mm) of rain falls across August on average, the 2nd-driest month of the year. The annual total is about 21.3 in (541 mm).
What should I pack for Lisbon in August?
Bring light, breathable clothes (highs average 73°F), sunscreen, sunglasses and a hat (high UV on clear days), quick-dry fabrics (81% average humidity) and comfortable walking shoes (most picks involve some walking).
Planning Lisbon in August?
Share this August plan with your group, poll everyone on dates and keep the packing list in one place.