Spain Barcelona Weather in August — Climate Guide
August in Barcelona is Hot
August is Hot for Barcelona.
August is the Spanish summer holiday — locals leave, tourists pack in. **Festa Major de Gràcia** (mid-August) is the must-see: decorated streets in the Gràcia neighborhood (each block competes for best decoration), free music, dancing 7 nights. Many neighborhood restaurants close — chains and tourist spots stay open. Sea peak at 24°C.
Travel score
Barcelona August Weather Stats
Avg High
29°C
Avg Low
21°C
Rainy Days
4
49mm total
Sunshine
9h
Daily avg
Humidity
71%
Warm humid
UV Index
8
Very high
Wind
11 km/h
Gusts 22
Sea Temp
24°C
Avg water temp
Crowds
Very busy
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
24 μg/m³
PM10
36 μg/m³
Status
Moderate
Feels-Like Temperature & Wind
Feels like
Daytime
30°C
Nighttime
21°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 22 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Festa Major de Gràcia neighborhood party
- Sea warmest of year (24°C)
- Festes del Carme (Sitges)
Cons
- Many local restaurants closed
- Heat + crowds
- Pickpocketing peak season
- Hotel prices at max
August Events & Festivals
- Festa Major de Gràcia (mid-August) — decorated streets, music
- Festa Major de Sants (late August)
- Diada Nacional approaches (Sep 11)
Barcelona in August — Full Picture
August is the Spanish summer holiday — locals leave, tourists pack in. **Festa Major de Gràcia** (mid-August) is the must-see: decorated streets in the Gràcia neighborhood (each block competes for best decoration), free music, dancing 7 nights. Many neighborhood restaurants close — chains and tourist spots stay open. Sea peak at 24°C.
What to Wear & What to Pack
Identical to July — hot, beach gear. Pack rain jacket: short intense thunderstorms common late August (heat-driven).
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
18.7°C
10°C
5.7/mo
Summer (Jun·Jul·Aug)
Current28°C
19.3°C
3.7/mo
Autumn (Sep·Oct·Nov)
21.7°C
13.7°C
5.3/mo
Winter (Dec·Jan·Feb)
14.3°C
5.7°C
5/mo
Barcelona Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 14° | 5° | 5d·41mm | 5h | 70% | 2 | Quiet | Low season | |
| 15° | 6° | 5d·39mm | 6h | 70% | 3 | Quiet | Low season | |
| 16° | 8° | 5d·36mm | 6h | 69% | 4 | Moderate | Shoulder | |
| 18° | 9° | 6d·47mm | 7h | 70% | 5 | Moderate | Peak | |
| May (Best) | 22° | 13° | 6d·47mm | 8h | 71% | 7 | Busy | Peak |
| June (Best) | 26° | 17° | 4d·30mm | 9.5h | 70% | 9 | Busy | Peak |
| 29° | 20° | 3d·21mm | 10.5h | 70% | 9 | Very busy | Peak | |
| 29° | 21° | 4d·49mm | 9h | 71% | 8 | Very busy | Peak | |
| September (Best) | 26° | 18° | 5d·60mm | 7.5h | 71% | 6 | Busy | Peak |
| 22° | 14° | 6d·87mm | 6h | 72% | 4 | Moderate | Shoulder | |
| 17° | 9° | 5d·53mm | 5h | 72% | 2 | Quiet | Low season | |
| 14° | 6° | 5d·41mm | 4.5h | 71% | 1 | Busy | Peak |
View Other Months
Barcelona August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Barcelona?
Barcelona in August is Hot. Tourist crowds are very busy and flight/hotel prices are peak.
What's the average temperature in Barcelona in August?
Barcelona August averages a high of 29°C and a low of 21°C.
Does it rain much in Barcelona in August?
Barcelona August averages 49mm of rainfall over about 4 rainy days.
What should I wear in Barcelona in August?
Identical to July — hot, beach gear. Pack rain jacket: short intense thunderstorms common late August (heat-driven).
What time are sunrise and sunset in Barcelona in August?
Barcelona August sunrise is 06:55 and sunset is 20:50, with 13h 55m of daylight.
What's the air quality like in Barcelona in August?
Barcelona August air quality (AQI) averages 55, rated Moderate. PM2.5 averages 24μg/m³.
What activities are recommended in Barcelona in August?
In August, Barcelona is great for Festa Major de Gràcia, Beach swimming (sea 24°C), Costa Brava day trip.
Is August peak season in Barcelona?
Barcelona August crowds are very busy and prices are peak. Advance reservations are strongly recommended.
Best Months to Visit Barcelona
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.