Myrtle Beach Weather in August

August continues the hot summer temperatures at Myrtle Beach, South Carolina. For most of the month this vacation destination enjoys sunny and dry weather.

This page gives detailed information on the typical August weather for Myrtle Beach.

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The temperature and rainfall numbers here are historical averages based on climate data gathered at Myrtle Beach. The sunshine and humidity measurements are averages from the Charleston International Airport located south along the coast in North Charleston, SC. This weather station has a climate similar to Myrtle Beach and is the closest one that collects sun and humidity information for the National Climatic Data Center.

Temperature Weather iconTemperature

87 °F August average high 31 °C
70 °F August average low 21 °C

In most years, Myrtle Beach averages a daily maximum temperature for August that's between 86 and 89 degrees Fahrenheit (30 to 32 degrees Celsius). The minimum temperature usually falls between 68 and 72 °F (20 to 22 °C).

The days at Myrtle Beach begin to cool a little during August. By the end of the month, the temperature has dropped around 1 °F (0.5 °C) below what it was at the start.

6 days 90 °F max. or more (32 °C)
15 days 70 °F min. or less (21 °C)

Nearly every day in August warms to over 80 °F (27 °C) in Myrtle Beach. Temperatures above 100 °F (38 °C) are not expected here this month.

August averages only one night this month when the thermometer dips to 60 °F (16 °C).

Rainy Weather iconRain

6.2 in total precipitation 157 mm
10 days of rain

August is rainier than most months at Myrtle Beach.

Sunny Weather iconSun

64 % sunshine
6 days clear skies

The sun's rays reach the ground in Myrtle Beach during 64 percent of daylight hours on average in August, for a total of 265 hours in the month. Typically on 6 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in August at the resort city lasts for 13 hours and 21 minutes a day on average. The longest day of the month is the 1st with 13 hours and 48 minutes of daylight. By the end of the month, the days have shortened to 12:53 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

79 % August average humidity

The relative humidity in Myrtle Beach during August usually peaks at 91 percent in the morning then drops to 63 percent by early afternoon. This is the most humid month for the vacation city.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 89 91 89 71 63 66 77 86

Stormy Weather iconStorms

10 % chance a named storm approaches

There's a 4 percent probability that a hurricane will approach within 100 miles (165 km) of Myrtle Beach during August. The chance of a major hurricane (category 3 to 5) reaching the area is 1 percent.


These weather data are long-term historical averages provided by the National Climatic Data Center of the United States. The temperature and precipitation numbers are 1981-2010 normals while the humidity statistics are 1961-1990 normals. The named storm probabilities come from the Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division.

Myrtle Beach Weather
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