Caraguatatuba weather in September

In September, Caraguatatuba sees average daytime highs of 23°C and overnight lows near 16°C, with 111 mm of rain across 13.2 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 29% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Caraguatatuba's 6th-clearest and 1st-windiest month. For the whole year in context, see Caraguatatuba's year-round climate.

Daytime high
23°
8th warmest
Overnight low
16°
4th coldest
Rainfall
111 mm
13.2 wet days
Daylight
11 h 54 min
7:00 AM – 6:52 PM
Cloud cover
64%
6th clearest
Wind
8 km/h
1st windiest
Solar energy
4.45 kWh/m²
Travel score
6.3
out of 10

Caraguatatuba is human settlement in Brazil.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 23°C through the month.

A typical September day in Caraguatatuba reaches about 23°C in the afternoon and slips back to 16°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 29°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12315
22315
32315
42315
52315
62315
72315
82316
92316
102316
112316
122316
132316
142316
152316
162316
172316
182316
192316
202316
212316
222316
232316
242316
252316
262316
272316
282316
292316
302316

Caraguatatuba weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 20°29726.613.34.0
Feb27° / 21°22223.412.84.1
Mar26° / 20°21424.212.24.5
Apr25° / 18°10614.611.56.1
May22° / 16°8911.610.96.5
Jun22° / 15°618.110.67.0
Jul22° / 14°72810.77.1
Aug22° / 14°557.811.27.1
Sep23° / 16°11113.211.96.3
Oct24° / 17°13216.712.65.6
Nov24° / 18°17820.213.15.1
Dec26° / 20°22423.713.44.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 60%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25446
35248
45149
54951
64852
74852
84753
94555
104456
114357
124357
134258
144159
154060
164060
174060
183961
193763
203664
213565
223466
233367
243268
253169
263169
272971
282872
292773
302773

Chance of precipitation in September

Any precipitation

Caraguatatuba gets around 111 mm of rain over 13.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
133
233
334
434
535
635
736
837
937
1038
1138
1239
1339
1440
1541
1642
1743
1844
1945
2047
2148
2249
2350
2450
2551
2651
2751
2851
2951
3051

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 49% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11247401
21146411
31046421
41045432
5944442
6944452
7843462
8842473
9842483
10741483
11741493
12640504
13639514
14638515
15637525
16636535
17636526
18735526
19734527
20833527
21833518
22832519
238315110
248305111
258295112
268295013
278284914
288284916
298274817
308274818

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over September. Sunrise moves from 7:16 AM to 6:45 AM, and sunset from 6:47 PM to 6:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:166:47
211.57:156:47
311.67:146:48
411.67:136:48
511.67:126:48
611.67:116:49
711.77:106:49
811.77:096:49
911.77:086:50
1011.77:066:50
1111.77:056:50
1211.87:046:51
1311.87:036:51
1411.87:026:51
1511.87:016:52
1611.97:006:52
1711.96:596:52
1811.96:586:53
1911.96:576:53
2012.06:566:53
2112.06:556:54
2212.06:546:54
2312.06:536:54
2412.16:516:55
2512.16:506:55
2612.16:496:55
2712.16:486:56
2812.16:476:56
2912.26:466:56
3012.26:456:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.45 kWh/m².

For context, solar energy here swings from a low near 3.26 kWh/m² to a high of 5.54 kWh/m² in December across the year — September's 4.45 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Caraguatatuba

In seasonPeak

None of Caraguatatuba's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Caraguatatuba's rainy season runs November–March, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Caraguatatuba?

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

6.3
Sightseeing
5th-best month of the year
4.8
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Caraguatatuba for sightseeing.

What to pack for Caraguatatuba in September

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

In September, Caraguatatuba sees daytime highs around 23°C and nights near 16°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Caraguatatuba in September

The nearest coast averages about 21°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 km away) is warmest in February at about 27°C and coldest in August near 21°C.

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

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb27Warm
Mar26Warm
Apr26Warm
May24Refreshing
Jun22Refreshing
Jul21Refreshing
Aug21Refreshing
Sep21Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Caraguatatuba in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Caraguatatuba peaks around February 8 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 highExtremeFeb 8UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Caraguatatuba in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Caraguatatuba is worst in June — around 32 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 16 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2132 µg/m³Nov 2316 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar19Moderate
Apr21Moderate
May27Moderate
Jun32Moderate
Jul31Moderate
Aug28Moderate
Sep28Moderate
Oct20Moderate
Nov16Moderate
Dec16Moderate
Location & terrain

Where is Caraguatatuba?

Caraguatatuba sits at 23.6°S, 45.4°W, 2 m above sea level, in Brazil. The nearest listed city is São Sebastião, 16 km away.

Topography around Caraguatatuba

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

Within 3 km, the terrain around Caraguatatuba has significant variations in elevation — a maximum elevation change of 496 m around an average of 60 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,032 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,703 m.

The land around Caraguatatuba is covered by trees (42%), artificial surfaces (29%) and water (22%) within 3 km, trees (52%) and water (33%) within 16 km, and water (44%) and trees (35%) within 80 km.

3 km
496 m
16 km
1,032 m
80 km
1,703 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: São Sebastião 16 km · Ilhabela 18 km · Paraibuna 36 km · Ubatuba 41 km · Salesópolis 46 km · Biritiba Mirim 64 km · Caçapava 65 km · Jacareí 66 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 Caraguatatuba (-23.6203°, -45.4131°, elevation 2 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).