August weather forecast
Captiva, FL

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.