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

Temperature records mark August as the warmest month, with highs averaging 88°F (31.1°C) and lows at 81°F (27.2°C).

Heat index

For most parts of August, the heat index is estimated at a torrid 102.2°F (39°C). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', ties air temperature with relative humidity to produce the perceived temperature sensation. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The average relative humidity in August 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

August is the month with the warmest seawater in Captiva, with an average ocean temperature of 86°F (30°C).
Note: Experiencing water temperatures over 86°F (30°C) might rob swimmers of the refreshing sensation they seek.

Daylight

In August, the average length of the day 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

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 unprotected exposure to Sun's UV rays for the average person.
Note: A typical high UV index of 7 in August suggests the following recommendations:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be attentive! The UV exposure is heightened with reflections from sand and water.