Arraial do Cabo weather in August

In August, Arraial do Cabo sees average daytime highs of 22°C and overnight lows near 21°C, with 28 mm of rain across 6.1 wet days and about 11.2 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 60% of the time in August, and the air most often feels muggy.

Daylight stretches from about 10 h 54 min at the start of August to 11 h 30 min by month's end. Set against the rest of the year, August is Arraial do Cabo's 1st-clearest and 3rd-windiest month. For the whole year in context, see Arraial do Cabo's year-round climate.

Daytime high
22°
12th warmest
Overnight low
21°
1st coldest
Rainfall
28 mm
6.1 wet days
Daylight
11 h 12 min
7:16 AM – 6:28 PM
Cloud cover
37%
1st clearest
Wind
25 km/h
3rd windiest
Solar energy
4.53 kWh/m²
Travel score
7.7
out of 10

Arraial do Cabo is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical August day in Arraial do Cabo reaches about 22°C in the afternoon and slips back to 21°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 23°C. Set against its neighbours, August runs on par with July and on par with September.

15°18°20°23°25°151015202531
Avg high (°C)Avg low (°C)
12221
22221
32221
42221
52221
62220
72220
82220
92220
102220
112220
122220
132220
142220
152220
162220
172220
182220
192220
202221
212221
222221
232221
242221
252221
262221
272221
282221
292221
302221
312221

Arraial do Cabo weather by month

How August compares with the rest of the year at a glance. August is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan25° / 24°888.313.37.1
Feb26° / 24°52612.87.3
Mar26° / 24°1051112.26.7
Apr25° / 24°579.511.57.2
May24° / 22°5810.110.97.3
Jun23° / 21°346.410.67.8
Jul22° / 21°356.610.77.7
Aug22° / 21°286.111.27.7
Sep22° / 21°477.111.97.4
Oct23° / 21°547.712.57.2
Nov24° / 22°10110.613.16.7
Dec25° / 23°969.713.46.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 60% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 26%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17525
27525
37426
47426
57426
67426
77426
87426
97426
107426
117426
127426
137426
147426
157525
167525
177525
187525
197525
207426
217426
227525
237525
247525
257525
267525
277525
287525
297426
307426
317426

Chance of precipitation in August

Any precipitation

Arraial do Cabo gets around 28 mm of rain over 6.1 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 20% and peaks near 21% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
120
220
320
420
521
621
721
821
921
1021
1121
1221
1321
1421
1521
1621
1721
1821
1921
2020
2120
2220
2319
2419
2519
2619
2719
2819
2919
3019
3119

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the muggy band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 51% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
141627530
241628520
341628511
441628511
541628511
641629501
751629501
851629501
951629491
1051629491
1151630481
1251630481
1351630481
1451631471
1551631471
1651631471
1751631471
1851631481
1941531481
2041531491
2141531491
2241431501
2341431510
2431430530
2531330540
2641329540
2741328550
2841327560
2941327560
3041326561
3141326561

Wind in August

Winds average 25 km/h in August.

Across August, daily wind ranges from about 23 km/h on the calmest days to 26 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
123breezy
223breezy
323breezy
423breezy
524breezy
624breezy
724breezy
824breezy
924breezy
1024breezy
1124breezy
1224breezy
1325breezy
1425breezy
1525breezy
1625breezy
1725breezy
1825breezy
1925breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2726breezy
2826breezy
2926breezy
3026breezy
3126breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 54 min at the start of August to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over August. Sunrise moves from 7:26 AM to 7:03 AM, and sunset from 6:22 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:266:22
210.97:266:23
311.07:256:23
411.07:256:23
511.07:246:24
611.07:236:24
711.07:236:25
811.07:226:25
911.17:216:25
1011.17:216:26
1111.17:206:26
1211.17:196:27
1311.17:196:27
1411.27:186:27
1511.27:176:28
1611.27:166:28
1711.27:156:29
1811.27:156:29
1911.37:146:29
2011.37:136:30
2111.37:126:30
2211.37:116:30
2311.37:106:31
2411.47:096:31
2511.47:086:31
2611.47:086:32
2711.47:076:32
2811.47:066:33
2911.57:056:33
3011.57:046:33
3111.57:036:33

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.53 kWh/m².

For context, solar energy here swings from a low near 3.58 kWh/m² to a high of 6.65 kWh/m² in February across the year — August's 4.53 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.3Bright
94.3Bright
104.3Bright
114.4Bright
124.4Bright
134.4Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.6Bright
194.6Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.8Bright
254.8Bright
264.8Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
315.0Bright
Planning a trip in August

Is August a good time to visit Arraial do Cabo?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.7
Sightseeing
2nd-best month of the year
5.3
Beach & pool
11th-best month of the year

August is one of the better times to visit Arraial do Cabo for general sightseeing.

What to pack for Arraial do Cabo in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Arraial do Cabo sees daytime highs around 22°C and nights near 21°C. Worth packing: light clothes, sun protection and a windbreaker. About 6 days see rain.

light clothessun protectiona windbreaker

Sea temperature near Arraial do Cabo in August

The nearest coast averages about 22°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 km away) is warmest in March at about 25°C and coldest in September near 21°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°22°24°26°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb24Warm
Mar25Warm
Apr25Warm
May24Refreshing
Jun23Refreshing
Jul22Refreshing
Aug22Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec24Refreshing

UV index in Arraial do Cabo in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Arraial do Cabo peaks around January 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 15UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep7High
Oct11Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Arraial do Cabo?

Arraial do Cabo sits at 23.0°S, 42.0°W, 11 m above sea level, in Brazil. The nearest listed city is Cabo Frio, 9.0 km away.

Topography around Arraial do Cabo

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Arraial do Cabo.

Within 3 km, the terrain around Arraial do Cabo has only modest variations in elevation — a maximum elevation change of 164 m around an average of 12 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 375 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,806 m.

The land around Arraial do Cabo is covered by water (59%) within 3 km, water (84%) within 16 km, and water (55%) and trees (23%) within 80 km.

3 km
164 m
16 km
375 m
80 km
1,806 m
treesgrasslandartificial surfacesbare terrainwaterwetland
August weather nearby: Cabo Frio 9.0 km · São Pedro da Aldeia 16 km · Iguaba Grande 25 km · Buzios 29 km · Araruama 34 km · Saquarema 46 km · Rio das Ostras 50 km · Silva Jardim 51 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Arraial do Cabo (-22.9661°, -42.0278°, elevation 11 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).