Marco Island weather in August

In August, Marco Island sees average daytime highs of 87°F and overnight lows near 79°F, with 5.5 in of rain across 21.6 wet days and about 12.9 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 87°F through the month. The sky is clear or mostly clear about 19% of the time in August, and the air most often feels miserable.

Daylight stretches from about 13 h 12 min at the start of August to 12 h 36 min by month's end. Set against the rest of the year, August is Marco Island's 12th-clearest and 11th-windiest month. For the whole year in context, see Marco Island's year-round climate.

Daytime high
87°
1st warmest
Overnight low
79°
12th coldest
Rainfall
5.5 in
21.6 wet days
Daylight
12 h 54 min
6:03 AM – 6:59 PM
Cloud cover
68%
12th clearest
Wind
7 mph
11th windiest
Solar energy
5.9 kWh/m²
Travel score
3.5
out of 10

Marco Island is city in Collier County, Florida, United States.

Founded
1886

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 87°F through the month.

A typical August day in Marco Island reaches about 87°F in the afternoon and slips back to 79°F overnight — a 8°F spread between the day's warmth and the night's chill. On most days the high lands between 84°F and 90°F. Set against its neighbours, August runs on par with July and on par with September.

70°80°90°151015202531
Avg high (°F)Avg low (°F)
18779
28779
38779
48779
58779
68779
78779
88779
98779
108779
118779
128779
138779
148779
158779
168779
178779
188779
198779
208779
218779
228779
238779
248779
258779
268779
278779
288779
298779
308779
318679

How August really feels in Marco Island

Once humidity and wind are folded in, August averages 31 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
31
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Marco Island weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan72° / 61°1.5510.67.7
Feb73° / 62°1.13.911.18.1
Mar76° / 65°1.34.211.88.2
Apr80° / 69°1.65.512.67.6
May84° / 74°2.79.113.36.0
Jun86° / 78°5.919.413.64.0
Jul87° / 79°5.020.813.53.6
Aug87° / 79°5.521.612.93.5
Sep86° / 78°5.919.712.23.9
Oct83° / 74°3.19.111.46.1
Nov78° / 68°1.33.810.78.0
Dec74° / 64°1.1410.48.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in August, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23862
33862
43862
53862
63862
73862
83961
93961
104060
113961
123961
134060
144060
154060
164060
173961
183961
193961
204060
213961
223862
233862
243763
253664
263664
273565
283565
293565
303466
313367

Chance of precipitation in August

Any precipitation

Marco Island gets around 5.5 in of rain over 21.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 70% and peaks near 72% on the wettest days.

0%20%40%60%80%151015202531
Rain chance (%)
169
269
369
469
569
669
769
868
968
1068
1168
1268
1368
1468
1568
1669
1769
1870
1970
2070
2171
2271
2371
2471
2572
2672
2772
2872
2972
3072
3172

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the miserable band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
104357
204258
304258
404258
504159
604159
704060
804060
904060
1003961
1103961
1203961
1303961
1403961
1503961
1604060
1704060
1814059
1914059
2014158
2114158
2214158
2314257
2414356
2504357
2604456
2704555
2804654
2904753
3004852
3114950

Wind in August

Winds average 7 mph in August.

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

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 12 min at the start of August to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over August. Sunrise moves from 5:56 AM to 6:10 AM, and sunset from 7:10 PM to 6:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:567:10
213.25:577:09
313.25:577:09
413.25:587:08
513.25:587:07
613.15:597:07
713.15:597:06
813.16:007:05
913.16:007:04
1013.16:017:04
1113.06:017:03
1213.06:017:02
1313.06:027:01
1413.06:027:00
1512.96:036:59
1612.96:036:59
1712.96:046:58
1812.96:046:57
1912.96:056:56
2012.86:056:55
2112.86:066:54
2212.86:066:53
2312.86:076:52
2412.76:076:51
2512.76:076:50
2612.76:086:49
2712.76:086:48
2812.66:096:47
2912.66:096:46
3012.66:106:45
3112.66:106:44

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.9 kWh/m².

For context, solar energy here swings from a low near 3.55 kWh/m² to a high of 6.75 kWh/m² in May across the year — August's 5.9 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.0Intense
126.0Intense
136.0Intense
146.0Intense
156.0Bright
166.0Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.8Bright
225.8Bright
235.8Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.6Bright
295.6Bright
305.6Bright
315.5Bright
Planning a trip in August

Hazard calendar for Marco Island

In seasonPeak

In August, Marco Island sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.

Marco Island sits in the Atlantic hurricane belt; the season peaks August–October.

Marco Island's rainy season runs May–October, when most of the year's rain falls.

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

Is August a good time to visit Marco Island?

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

3.5
Sightseeing
12th-best month of the year
4.9
Beach & pool
12th-best month of the year

August is a weaker month for outdoor sightseeing in Marco Island.

What to pack for Marco Island in August

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

In August, Marco Island sees daytime highs around 87°F and nights near 79°F. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Marco Island in August

The nearest coast averages about 86°F in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 86°F and coldest in January near 69°F.

The water stays above 68°F all year — warm enough for a swim any month.

70°80°90°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan69Refreshing
Feb69Refreshing
Mar72Refreshing
Apr76Warm
May81Warm
Jun84Tropical
Jul86Tropical
Aug86Tropical
Sep85Tropical
Oct82Warm
Nov76Warm
Dec72Refreshing

UV index in Marco Island in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Marco Island peaks around July 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJul 17UV 12Dec 18UV 5
UV index (midday)Level
Jan5High
Feb7Very high
Mar9Very high
Apr10Very high
May10Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep10Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Marco Island 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 Marco Island is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1819 µg/m³Dec 147 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb9Good
Mar12Good
Apr10Good
May11Good
Jun15Moderate
Jul20Moderate
Aug17Moderate
Sep12Moderate
Oct9Good
Nov8Good
Dec7Good
Location & terrain

Where is Marco Island?

Marco Island sits at 25.9°N, 81.7°W, 3 ft above sea level, in United States. The nearest listed city is East Naples, 14 mi away.

Topography around Marco Island

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Marco Island.

Within 2 miles, the terrain around Marco Island has only modest variations in elevation — a maximum elevation change of 43 ft around an average of 7 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 62 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 98 ft.

The land around Marco Island is covered by water (44%) and artificial surfaces (42%) within 2 miles, water (64%) and mangroves (20%) within 10 miles, and water (44%) and trees (21%) within 50 miles.

2 miles
43 ft
10 miles
62 ft
50 miles
98 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
August weather nearby: East Naples 14 mi · Naples 15 mi · Golden Gate 17 mi · Bonita Springs 28 mi · Estero 35 mi · San Carlos Park 37 mi · Immokalee 38 mi · Iona 43 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Marco Island (25.9412°, -81.7184°, elevation 3 ft), 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).