August weather forecast
Captiva, FL

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Weather in August

August retains high summer conditions in Captiva. Maximum temperature hangs on at 88°F, merely adding to the pervasive heat. An escalation in rainfall to 1.93" brings refreshing, albeit brief, showers. A slight downward shift occurs in daylight hours though the UV index remains. In spite of the showers and sticky conditions, Captiva continues to allure with its bewitching panorama.

Temperature

August, recording an average high temperature of 88°F and a low temperature of 81°F, is Captiva's warmest month.

Heat index

Throughout August, the heat index is computed to be a torrid 102.2°F. More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In Captiva, the average relative humidity in August is 73%.

Rainfall

The month with the most rainfall in Captiva is August, when the rain falls for 18.3 days and typically aggregates up to 1.93" of precipitation.

Ocean temperature

August is the month with the warmest seawater, with an average ocean temperature of 86°F.
Note: The charm of diving into cool waters is arguably lost when temperatures surpass 86°F.

Daylight

The average length of the day in August is 13h and 3min.
On the first day of the month, sunrise is at 6:53 am and sunset at 8:16 pm. On the last day of August, in Captiva, sunrise is at 7:08 am and sunset at 7:50 pm EDT.

Sunshine

In August, the average sunshine is 9.7h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 7 in August translates into this advice:
Guard against overexposure. Protection from sun-induced harm is essential. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be mindful! Sand and water reflections can up the Sun's UV exposure.
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FAQ

What are the warmest months in Captiva?

August, with an average high of 88°F and a low of 81°F, signifies the warmest month of the year in Captiva, Florida.

How hot is it in Captiva in August?

In Captiva, 88°F is the average high-temperature and 81°F is the average low-temperature during August. In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is computed to be 102.2°F.

What is the average humidity in August in Captiva?

The average relative humidity in August is 73%.

What is the rainiest month in Captiva?

August is the month with the most rainfall in Captiva. Rain falls for 18.3 days and accumulates 1.93" of precipitation.

How much does it rain in Captiva in August?

In Captiva, during August, the rain falls for 18.3 days and regularly aggregates up to 1.93" of precipitation.

When is the ocean warmest in Captiva?

August is the month with the warmest seawater in Captiva, Florida, with an average ocean temperature of 86°F.

How warm is the water in August in Captiva?

In Captiva, Florida, in August, the average water temperature is 86°F. The surface water temperatures above 86°F are arguably considered as unpleasant for swimming, and any intense water activity, as the refreshing effect of water is missing.

What is the average length of the day in August in Captiva?

In August, the average day length is 13h and 3min.

When are sunrise and sunset in August in Captiva?

In August, on the first day of the month, sunrise is at 6:53 am and sunset at 8:16 pm. On the last day of the month, in Captiva, Florida, sunrise is at 7:08 am and sunset at 7:50 pm EDT.

How many hours of sunshine does Captiva have in August?

In August, the average sunshine duration is 9.7h.

When is the highest UV index in Captiva?

The months with the highest UV index in Captiva, Florida, are May through September, with an average maximum UV index of 7.

What is the UV index intensity in August in Captiva?

In August, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average sea temperature
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Captiva, FL

Average temperature in August - Captiva, FL
  • Average high temperature in August: 88°F

The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (70°F).

  • Average low temperature in August: 81°F

The month with the highest average low temperature is August (81°F).
The coldest month (with the lowest average low temperature) is January (58.8°F).

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Average pressure in August
Captiva, FL

Average pressure in August - Captiva, FL
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).

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Average wind speed in August
Captiva, FL

Average wind speed in August - Captiva, FL
  • Average wind speed in August: 7.3mph

The windiest months (with the highest average wind speed) are October and November (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

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Average humidity in August
Captiva, FL

Average humidity in August - Captiva, FL
  • Average humidity in August: 73%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is March (72%).

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Average rainfall in August
Captiva, FL

Average rainfall in August - Captiva, FL
  • Average rainfall in August: 1.93"

The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is March (0.16").

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Average rainfall days in August
Captiva, FL

Average rainfall days in August - Captiva, FL
  • Average rainfall days in August: 18.3 days

The month with the highest number of rainy days is September (19.5 days).
The month with the least rainy days is February (4.1 days).

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Average sea temperature in August
Captiva, FL

Average sea temperature in August - Captiva, FL
  • Average sea temperature in August: 86°F

The best month for swimming (with the highest average sea temperature) is August (86°F).
The coldest month (with the lowest average sea temperature) is February (70°F).

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Average daylight in August /
Average sunshine in August
Captiva, FL

Average daylight in August / Average sunshine in August - Captiva, FL
  • Average daylight in August: 13h and 0min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in August: 9h and 4min

The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

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Average sunshine days in August
Captiva, FL

Average sunshine days in August - Captiva, FL
  • Average sunshine days in August: 7.5 days

The month with the most sunshine days is January (25.1 days).
The month with the least sunshine days is September (7.2 days).

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Average UV index in August
Captiva, FL

Average UV index in August - Captiva, FL
  • Average UV index in August: 7

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and February (UV index 5).

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Average cloud cover in August
Captiva, FL

Average cloud cover in August - Captiva, FL
  • Average cloud cover in August: 27

The month with the most cloud cover is January (Cloud cover 29).
The months with the least cloud cover are March and May (Cloud cover 23).

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Average visibility in August
Captiva, FL

Average visibility in August - Captiva, FL
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Captiva, Florida, USA

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