August weather forecast
Sanibel, FL

August's weather continues in the same vein as July’s, with high heat and substantial rainfall. Despite the formidable weather elements, Sanibel's August climate remains suited to outdoor activities, thanks to its significant daylight and sunshine hours. The city maintains regular weather patterns in August, with the highest daily average temperature standing at around 86.5°F (30.3°C). Concurrently, the month affords a good balance of light conditions, consisting of long daylight hours and significant sunshine moments. Even with the peak summer heat, Sanibel's August climate upholds the city's holiday appeal with its mild nights and enjoyable sea temperatures.

Temperature

Sanibel's temperatures peak on average in August, reaching 88°F (31.1°C) at their highest and 81.1°F (27.3°C) at their lowest.

Heat index

August's heat index is estimated at a sweltering 102.2°F (39°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
One should consider that heat index numbers are for shaded settings and light wind. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gives an indication of how one might feel in terms of heat after considering humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

March, May, July, August and October, with an average relative humidity of 73%, are the least humid months.

Rainfall

The month with the most rainfall is August, when the rain falls for 27.3 days and typically aggregates up to 8.54" (217mm) of precipitation.

Ocean temperature

August is the month with the warmest seawater, with an average ocean temperature of 87.1°F (30.6°C).
Note: Water sports might not feel as refreshing in waters heated beyond 86°F (30°C).

Daylight

In Sanibel, Florida, the average length of the day in August is 13h and 2min.
On the first day of August, sunrise is at 6:53 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 7:48 pm EDT.

Sunshine

In August, the average sunshine in Sanibel is 9.6h.

UV index

The months with the highest UV index in Sanibel are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index, 7 in August, converts into the following recommendations:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Caution! The Sun's UV rays become stronger due to reflections from water and sand.