August weather forecast
Myrtle Beach, SC

August unfolds a tad cooler than July in Myrtle Beach, South Carolina but continues to exhibit a palpable summer vibe. This month is characterized by a slight drop in temperature with highs at an average of 85.6°F (29.8°C) and a low at 75.6°F (24.2°C). August holds the record for the most rainfall throughout the year, with a total of 4.53" (115mm) dispersed over approximately 19.8 days. As summer draws to a close, the transition into September is marked by a significant reduction in temperature and a drop in precipitation. Despite the slight downturn in the weather, August still offers ideal conditions for beach visits and other outdoor activities.

Temperature

The introduction of August in Myrtle Beach notes a subtle temperature variation to a moderately hot 85.6°F (29.8°C) from July's 86.7°F (30.4°C). Throughout August, Myrtle Beach encounters an average temperature drop to a still warm 75.6°F (24.2°C).

Heat index

For most parts of August, the heat index is estimated at a fiery hot 98.6°F (37°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

May, June, August and December, with an average relative humidity of 78%, are the most humid months.

Rainfall

August is the month with the most rainfall. Rain falls for 19.8 days and accumulates 4.53" (115mm) of precipitation.

Snowfall

In Myrtle Beach, snow does not fall in March through November.

Ocean temperature

The month with the warmest seawater in Myrtle Beach is August, with an average ocean temperature of 82.9°F (28.3°C).
Note: Temperatures between 77°F (25°C) and 84.2°F (29°C) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.

Daylight

In August, the average length of the day is 13h and 22min.
On the first day of the month, sunrise is at 6:28 am and sunset at 8:15 pm. On the last day of August, in Myrtle Beach, sunrise is at 6:49 am and sunset at 7:42 pm EDT.

Sunshine

The months with the most sunshine are July and August, with an average of 10.9h of sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 7 during August translates into these guidelines:
Prevent overexposure. Protection from the sun's harmful effects is needed. 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. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Beware! Reflections from sand and water can intensify the Sun's UV radiation.