August in Barcelona features mostly sunny skies, warm afternoons with comfortable nights.
About 17 days, however, will likely be humid.
Daytime high temperatures will tend to be around 28-29 C (83-85 F) early in the month cooling slightly to 26-28 C (79-82 F) towards the end of the month.
A few of the warmer afternoons, especially early in August, can reach up near 31 C (88 F) with about 1 afternoon, on average, reaching 32 C (90 F) or more.
The record high temperature in Barcelona during August is 38.2 C (100.8 F).
Late night and early morning low temperatures tend to be around 21 C (69-70 F) early in August, cooling to 19-20 C (66-68 F) near the end of the month.
A few of the cooler mornings, especially later in the month, can dip down near 17 C (63 F).
The record low temperature in Barcelona during August is 15.2 C (59.4 F).
Sky and Rain
You can expect ample sunshine during August with about 20 days being sunny, 4 days partly sunny, and 6 days mostly cloudy.
Overcast days are more likely during the last half of the month. Rain falls on 5-7 days.
However, only 4 days this month typically record 1 mm (0.04 inches) or more rain.
The number of daylight hours decreases rapidly this month from about 14.4 hours on the 1st to about 13.2 hours by the 30th.
The wind in Barcelona this month tends to be mostly light to gentle at 6-19 kph/4-12 mph.
Ocean and Beach
August is an excellent beach month as water temperatures remain warm, mostly around 25-26 C (77-79 F).
With the warmer temperatures, beaches can get a bit crowded, especially on weekends.
What to Wear in Barcelona During Summer?
Summer brings warm temperatures and ample sunshine.
Semi-casual summer attire works well here like jeans and tees with both long and short-sleeved shirts.
Don’t forget your sunglasses, sunscreen, and some comfortable walking shoes and sandals.
Things to Do in Barcelona During August?
Most of August will be warm and sunny, so this is the perfect time to consider taking a pay-what-you-wish walking tour.
If you're a football fan, you'll be happy to hear that there should be a few FC Barcelona matches to catch this month.
You may also want to consider taking a sunset cruise to feel the wind blowing through your hair as the heat from the day finally dies down.
For even more ideas, make sure to check our post covering things to do in Barcelona.