August weather forecast
Marco Island, FL

Sunset over the beach in Marco Island Beach, Florida, along the Gulf of Mexico
Sunset over the beach in Marco Island Beach, Florida, along the Gulf of Mexico

Weather in August

The last month of the summer, August, is another tropical month in Marco Island, Florida, with average temperature fluctuating between 75.2°F (24°C) and 89.6°F (32°C).

Temperature

July through September, with an average high-temperature of 89.6°F (32°C), are the warmest months.

Rainfall

In Marco Island, during August, the rain falls for 16 days and regularly aggregates up to 8.03" (204mm) of precipitation. Throughout the year, there are 111 rainfall days, and 51.57" (1310mm) of precipitation is accumulated.

Ocean temperature

August is the month with the warmest seawater, with an average ocean temperature of 87.4°F (30.8°C).
Note: For swimming, other intense water activities, temperature above 86°F (30°C) is arguably unpleasant, as the water cooling effect is missing.

Daylight

In Marco Island, the average length of the day is 13h.

Sunshine

In Marco Island, the average sunshine in August is 9h.

UV index

Months with the highest UV index are April through August, with an average maximum UV index of 11. A UV Index reading of 11, and higher, represents an extreme threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 11 in August interpret into the following advice:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What are the warmest months in Marco Island?

July through September, with an average high-temperature of 89.6°F (32°C), are warmest months in Marco Island, Florida.

How much does it rain in Marco Island in August?

In Marco Island, Florida, during August, the rain falls for 16 days and regularly aggregates up to 8.03" (204mm) of precipitation.

When is the ocean warmest in Marco Island?

The month with the warmest seawater in Marco Island, Florida, is August, with an average ocean temperature of 87.4°F (30.8°C).

What is the ocean temperature in August in Marco Island?

In Marco Island, Florida, the average seawater temperature in August is 87.4°F (30.8°C). The surface water temperatures above 86°F (30°C) are arguably considered as unpleasant for swimming, and any intense water activity, as the refreshing effect of water is missing.

How many hours of daylight does Marco Island have in August?

In August, the average length of the day in Marco Island is 13h.

How many hours of sunshine does Marco Island have in August?

In Marco Island, Florida, the average sunshine in August is 9h.

What are the months with the highest UV index in Marco Island?

Months with the highest UV index are April through August, with an average maximum UV index of 11.

How high is the UV index in August in Marco Island?

The average daily maximum UV index in August in Marco Island is 11. A UV Index of 11, and more, symbolizes an ultimate hazard to health from unprotected exposure to the UV radiation.

Average temperature in August
Marco Island, FL

Average temperature in August - Marco Island, FL
  • Average high temperature in August: 90°F

The warmest months (with the highest average high temperature) are July, August and September (90°F).
Months with the lowest average high temperature are January, February and December (75°F).

  • Average low temperature in August: 75°F

The month with the highest average low temperature is August (75°F).
The coldest months (with the lowest average low temperature) are January and February (55°F).

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Average rainfall in August
Marco Island, FL

Average rainfall in August - Marco Island, FL
  • Average rainfall in August: 8"

The wettest month (with the highest rainfall) is June (9.2").
The driest months (with the least rainfall) are November and December (1.5").

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Average rainfall days in August
Marco Island, FL

Average rainfall days in August - Marco Island, FL
  • Average rainfall days in August: 16 days

The month with the highest number of rainy days is August (16 days).
The month with the least rainy days is April (4 days).

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Average sea temperature in August
Marco Island, FL

Average sea temperature in August - Marco Island, FL
  • Average sea temperature in August: 87.3°F

The best month for swimming (with the highest average sea temperature) is August (87.3°F).
The coldest months (with the lowest average sea temperature) are January and February (67.2°F).

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Average daylight in August /
Average sunshine in August
Marco Island, FL

Average daylight in August / Average sunshine in August - Marco Island, FL
  • Average daylight in August: 13h

The month with the longest days is June (Average daylight: 13.7h).
The month with the shortest days is December (Average daylight: 10.5h).

  • Average sunshine in August: 9h

Months with the most sunshine are April, May, June and July (Average sunshine: 10h).
Months with the least sunshine are January, November and December (Average sunshine: 7).

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Average UV index in August
Marco Island, FL

Average UV index in August - Marco Island, FL
  • Average UV index in August: 11

Months with the highest UV index are April, May, June, July and August (UV index 11).
The month with the lowest UV index is December (UV index 5).

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