August weather forecast
Captiva, FL

August retains high summer conditions in Captiva. Maximum temperature hangs on at 88°F (31.1°C), merely adding to the pervasive heat. An escalation in rainfall to 1.93" (49mm) 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

In Captiva, the month of August is known for its highest average temperatures, reaching a high of 88°F (31.1°C) and a low of 81°F (27.2°C).

Heat index

The heat index for August is computed to be a sweltering 102.2°F (39°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Heat index details are generally centered around shaded locations and a mild breeze. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. 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 hold great significance to children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In August, the average relative humidity is 73%.

Rainfall

The month with the most rainfall is August, when the rain falls for 18.3 days and typically aggregates up to 1.93" (49mm) of precipitation.

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 86°F (30°C).
Note: For many, when water temperatures rise above 86°F (30°C), the cooling pleasure of swimming diminishes.

Daylight

In Captiva, the average length of the day in August is 13h and 3min.
On the first day of the month, sunrise is at 6:54 am and sunset at 8:15 pm. On the last day of August, sunrise is at 7:08 am and sunset at 7:49 pm EDT.

Sunshine

The average sunshine in August is 9.7h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 7 in August converts into the following recommendations:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.