São Francisco do Sul weather in August

In August, São Francisco do Sul sees average daytime highs of 22°C and overnight lows near 14°C, with 87 mm of rain across 9.3 wet days and about 11.1 hours of daylight. It is the 10th-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 30% of the time in August, and the air most often feels humid.

Daylight stretches from about 10 h 48 min at the start of August to 11 h 24 min by month's end. Set against the rest of the year, August is São Francisco do Sul's 2nd-clearest and 6th-windiest month. For the whole year in context, see São Francisco do Sul's year-round climate.

Daytime high
22°
10th warmest
Overnight low
14°
2nd coldest
Rainfall
87 mm
9.3 wet days
Daylight
11 h 06 min
7:47 AM – 6:51 PM
Cloud cover
61%
2nd clearest
Wind
6 km/h
6th windiest
Solar energy
3.28 kWh/m²
Travel score
6.7
out of 10

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 São Francisco do Sul reaches about 22°C in the afternoon and slips back to 14°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 27°C. Set against its neighbours, August runs about 1°C warmer than July and on par with September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12213
22213
32213
42214
52214
62214
72214
82214
92214
102214
112214
122214
132214
142214
152214
162214
172214
182214
192214
202214
212214
222314
232315
242315
252315
262315
272315
282315
292315
302315
312315

How August really feels in São Francisco do Sul

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

São Francisco do Sul weather by month

How August compares with the rest of the year at a glance. August is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 22°27924.413.53.6
Feb29° / 22°25521.612.93.6
Mar28° / 21°20222.412.24.3
Apr26° / 19°11614.111.45.8
May24° / 16°10712.210.76.5
Jun22° / 14°1041010.46.6
Jul21° / 13°899.910.56.5
Aug22° / 14°879.311.16.7
Sep23° / 16°14514.611.85.8
Oct24° / 18°14917.312.65.4
Nov26° / 19°16117.713.35.1
Dec28° / 21°19320.713.64.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34555
44555
54555
64555
74456
84258
94258
104159
114060
124159
134159
144159
154258
164258
174258
184456
194456
204456
214555
224555
234654
244654
254654
264654
274654
284456
294456
304456
314258

Chance of precipitation in August

Any precipitation

São Francisco do Sul gets around 87 mm of rain over 9.3 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 31% and peaks near 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
129
229
329
429
529
628
728
828
929
1029
1129
1229
1329
1430
1530
1630
1730
1830
1930
2030
2130
2231
2331
2432
2532
2633
2733
2834
2935
3036
3137

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13231333
23231333
33231334
43231334
53231334
63231334
73231335
83131325
93131335
103031336
113031336
122931346
132931346
142831356
152831366
162730376
172630386
182629396
192529406
202528416
212428426
222428427
232327437
242327437
252326447
262226448
272226448
282226438
292226439
302226439
3121264210

Wind in August

Winds average 6 km/h in August.

Across August, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 10 h 48 min at the start of August to 11 h 24 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 7:58 AM to 7:32 AM, and sunset from 6:43 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.87:586:43
210.87:576:44
310.87:576:44
410.87:566:45
510.87:556:45
610.97:556:46
710.97:546:46
810.97:536:47
910.97:526:47
1010.97:526:48
1111.07:516:48
1211.07:506:49
1311.07:496:49
1411.07:486:50
1511.07:476:50
1611.17:476:51
1711.17:466:51
1811.17:456:52
1911.17:446:52
2011.27:436:53
2111.27:426:53
2211.27:416:54
2311.27:406:54
2411.37:396:54
2511.37:386:55
2611.37:376:55
2711.37:366:56
2811.47:356:56
2911.47:346:57
3011.47:336:57
3111.47:326:58

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 3.28 kWh/m².

For context, solar energy here swings from a low near 2.53 kWh/m² to a high of 5.23 kWh/m² in December across the year — August's 3.28 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.0Moderate
23.0Moderate
33.0Moderate
43.0Moderate
53.0Moderate
63.0Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.1Moderate
113.1Moderate
123.1Moderate
133.2Moderate
143.2Moderate
153.2Moderate
163.2Moderate
173.2Moderate
183.3Moderate
193.3Moderate
203.3Moderate
213.4Moderate
223.4Moderate
233.4Moderate
243.4Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.5Moderate
303.5Moderate
313.5Moderate
Planning a trip in August

Is August a good time to visit São Francisco do Sul?

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

6.7
Sightseeing
1st-best month of the year
4.8
Beach & pool
6th-best month of the year

August is a reasonable time to visit São Francisco do Sul for sightseeing.

What to pack for São Francisco do Sul in August

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

In August, São Francisco do Sul sees daytime highs around 22°C and nights near 14°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near São Francisco do Sul in August

The nearest coast averages about 18°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 15 km away) is warmest in February at about 27°C and coldest in August near 18°C.

It's comfortable for a long swim from Sep 26 to Jun 19 — about 8.8 months when the water holds above 20°C.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar26Warm
Apr25Warm
May22Refreshing
Jun20Refreshing
Jul19Cool
Aug18Cool
Sep20Cool
Oct21Refreshing
Nov23Refreshing
Dec25Warm

UV index in São Francisco do Sul in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São Francisco do Sul peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 14Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5High
Jul5Moderate
Aug6High
Sep9Very high
Oct10Very high
Nov12Extreme
Dec13Extreme

Air quality in São Francisco do Sul in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in São Francisco do Sul is worst in August — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (February, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1115 µg/m³Feb 229 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr10Good
May12Good
Jun14Moderate
Jul15Moderate
Aug15Moderate
Sep14Moderate
Oct12Good
Nov9Good
Dec9Good
Location & terrain

Where is São Francisco do Sul?

São Francisco do Sul sits at 26.2°S, 48.6°W, 16 m above sea level, in Brazil. The nearest listed city is Itapoá, 14 km away.

Topography around São Francisco do Sul

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Francisco do Sul.

Within 3 km, the terrain around São Francisco do Sul has only modest variations in elevation — a maximum elevation change of 146 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 580 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,647 m.

The land around São Francisco do Sul is covered by water (53%) and trees (26%) within 3 km, trees (51%) and water (36%) within 16 km, and trees (55%) and water (33%) within 80 km.

3 km
146 m
16 km
580 m
80 km
1,647 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
August weather nearby: Itapoá 14 km · Araquari 16 km · Joinville 22 km · Garuva 32 km · Guaratuba 41 km · Barra Velha 43 km · Guaramirim 44 km · Matinhos 47 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 São Francisco do Sul (-26.2433°, -48.6381°, elevation 16 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).