Portugal Lisbon Weather in August — Climate Guide
August in Lisbon is Excellent
August is Excellent for Lisbon.
August is similar to July — peak summer, peak crowds, peak prices. Jazz em Agosto at the Gulbenkian Foundation Garden is the canonical summer concert series.
Portuguese families take August holidays. Some Lisbon neighborhood restaurants close 2-3 weeks. Tourist-area restaurants stay open. Beaches at peak crowds. Sintra cooler microclimate is the heat-escape day trip.
Travel score
Lisbon August Weather Stats
Avg High
28°C
Avg Low
18°C
Rainy Days
1
6mm total
Sunshine
11h
Daily avg
Humidity
60%
Comfortable
UV Index
9
Very high
Wind
11 km/h
Gusts 24
Sea Temp
20°C
Swimmable
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
12 μg/m³
PM10
22 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
28°C
Nighttime
17°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 24 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Jazz em Agosto at Gulbenkian
- Beach peak
- Driest month
Cons
- Some local restaurants closed for summer
- Yearly-peak prices + crowds
- Heatwaves continue
August Events & Festivals
- Jazz em Agosto (Gulbenkian Foundation)
- Lisbon Maritime + culinary festivals
- Some local restaurants closed
Lisbon in August — Full Picture
August is similar to July — peak summer, peak crowds, peak prices. Jazz em Agosto at the Gulbenkian Foundation Garden is the canonical summer concert series.
Portuguese families take August holidays. Some Lisbon neighborhood restaurants close 2-3 weeks. Tourist-area restaurants stay open. Beaches at peak crowds. Sintra cooler microclimate is the heat-escape day trip.
What to Wear & What to Pack
Same as July — T-shirts + shorts + light cardigan. Sunglasses + sunscreen mandatory.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
19.3°C
12°C
8.7/mo
Summer (Jun·Jul·Aug)
Current27°C
17.7°C
1.7/mo
Autumn (Sep·Oct·Nov)
21.7°C
14°C
8/mo
Winter (Dec·Jan·Feb)
14.3°C
8.3°C
12.3/mo
Lisbon Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 14° | 8° | 14d·110mm | 4.6h | 76% | 2 | Quiet | Low season | |
| 15° | 8° | 11d·80mm | 5.9h | 73% | 3 | Quiet | Low season | |
| 17° | 10° | 10d·60mm | 6.9h | 70% | 4 | Moderate | Shoulder | |
| April (Best) | 19° | 12° | 9d·60mm | 8.1h | 67% | 5 | Busy | Peak |
| May (Best) | 22° | 14° | 7d·45mm | 9.6h | 64% | 7 | Busy | Peak |
| June (Best) | 25° | 17° | 3d·16mm | 11h | 64% | 8 | Very busy | Peak |
| July (Best) | 28° | 18° | 1d·4mm | 11.5h | 60% | 9 | Very busy | Peak |
| August (Best) | 28° | 18° | 1d·6mm | 11h | 60% | 9 | Very busy | Peak |
| September (Best) | 26° | 17° | 4d·25mm | 9h | 65% | 7 | Busy | Peak |
| 22° | 14° | 8d·80mm | 6.6h | 71% | 4 | Moderate | Shoulder | |
| 17° | 11° | 12d·130mm | 5h | 78% | 2 | Moderate | Shoulder | |
| 14° | 9° | 12d·110mm | 4.6h | 77% | 2 | Moderate | Peak |
View Other Months
Lisbon August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Lisbon?
Lisbon in August is Excellent. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Lisbon in August?
Lisbon August averages a high of 28°C and a low of 18°C.
Does it rain much in Lisbon in August?
Lisbon August averages 6mm of rainfall over about 1 rainy days.
What should I wear in Lisbon in August?
Same as July — T-shirts + shorts + light cardigan. Sunglasses + sunscreen mandatory.
What time are sunrise and sunset in Lisbon in August?
Lisbon August sunrise is 06:50 and sunset is 20:30, with 13h 40m of daylight.
What's the air quality like in Lisbon in August?
Lisbon August air quality (AQI) averages 36, rated Good. PM2.5 averages 12μg/m³.
What activities are recommended in Lisbon in August?
In August, Lisbon is great for Jazz em Agosto, Cascais + Arrábida beaches, Sintra cool microclimate.
Is August peak season in Lisbon?
Lisbon August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Lisbon
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.