August weather forecast
Myrtle Beach, SC

The glorious Myrtle Beach in South Carolina, with lit city buildings
The glorious Myrtle Beach in South Carolina, with lit city buildings

Weather in August

The last month of the summer, August, is another warm month in Myrtle Beach, South Carolina, with an average temperature ranging between max 85.6°F (29.8°C) and min 75.6°F (24.2°C).

Temperature

In Myrtle Beach, the average high-temperature in August is essentially the same as in July - a moderately hot 85.6°F (29.8°C). In August, the average low-temperature is 75.6°F (24.2°C).

Heat index

The average heat index in August is calculated to be a torrid 98.6°F (37°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, pregnancy, differences in body mass, height, and shape), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The months with the highest humidity in Myrtle Beach are May, June, August and December, with an average relative humidity of 78%.

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, South Carolina, 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: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In August, the average length of the day is 13h and 22min.
On the first day of August in Myrtle Beach, sunrise is at 6:27 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 7:43 pm EDT.

Sunshine

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

UV index

June through August, with an average maximum UV index of 7, are months with the highest UV index in Myrtle Beach, South Carolina. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in August in Myrtle Beach?

In August, the average high-temperature is 85.6°F (29.8°C), and the average low-temperature is 75.6°F (24.2°C). in August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 98.6°F (37°C).

What is the most humid month in Myrtle Beach?

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

What is the average humidity in August in Myrtle Beach?

In Myrtle Beach, South Carolina, the average relative humidity in August is 78%.

What is the rainiest month in Myrtle Beach?

The month with the most rainfall in Myrtle Beach, South Carolina, is August, when the rain falls for 19.8 days and typically aggregates up to 4.53" (115mm) of precipitation.

How many days does it rain in August in Myrtle Beach?

In Myrtle Beach, South Carolina, in August, during 19.8 rainfall days, 4.53" (115mm) of precipitation is typically accumulated.

When it does not snow in Myrtle Beach?

March through November are months without snowfall in Myrtle Beach, South Carolina.

When is the ocean warmest in Myrtle Beach?

The month with the warmest seawater in Myrtle Beach is August, with an average ocean temperature of 82.9°F (28.3°C).

What is the ocean temperature in August in Myrtle Beach?

In Myrtle Beach, South Carolina, the average seawater temperature in August is 82.9°F (28.3°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in August in Myrtle Beach?

The average day length in August is 13h and 22min.

What time are sunrise and sunset in August in Myrtle Beach?

In August, on the first day of the month, sunrise is at 6:27 am and sunset at 8:16 pm. On the last day of the month, in Myrtle Beach, sunrise is at 6:48 am and sunset at 7:43 pm EDT.

What is the month with the most sunshine in Myrtle Beach?

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

How many hours of sunshine does Myrtle Beach have in August?

In August, the average sunshine duration in Myrtle Beach, South Carolina, is 10.9h.

What are the months with the highest UV index in Myrtle Beach?

June through August, with an average maximum UV index of 7, are months with the highest UV index in Myrtle Beach, South Carolina.

What is the UV index intensity in August in Myrtle Beach?

In August, the average daily maximum UV index in Myrtle Beach, South Carolina, is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Myrtle Beach, SC

Average temperature in August - Myrtle Beach, SC
  • Average high temperature in August: 85.6°F

The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (54.3°F).

  • Average low temperature in August: 75.6°F

The month with the highest average low temperature is July (76.3°F).
The coldest month (with the lowest average low temperature) is January (42.1°F).

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Average pressure in August
Myrtle Beach, SC

Average pressure in August - Myrtle Beach, SC
  • Average pressure in August: 29.99"Hg

The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed in August
Myrtle Beach, SC

Average wind speed in August - Myrtle Beach, SC
  • Average wind speed in August: 7.9mph

The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (7.9mph).

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Average humidity in August
Myrtle Beach, SC

Average humidity in August - Myrtle Beach, SC
  • Average humidity in August: 78%

The months with the highest relative humidity are May, June, August and December (78%).
The months with the lowest relative humidity are January and November (74%).

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Average rainfall in August
Myrtle Beach, SC

Average rainfall in August - Myrtle Beach, SC
  • Average rainfall in August: 4.53"

The wettest month (with the highest rainfall) is August (4.53").
The driest month (with the least rainfall) is January (1.02").

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Average rainfall days in August
Myrtle Beach, SC

Average rainfall days in August - Myrtle Beach, SC
  • Average rainfall days in August: 19.8 days

The months with the highest number of rainy days are July and August (19.8 days).
The month with the least rainy days is November (9.7 days).

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Average snowfall in August
Myrtle Beach, SC

Average snowfall in August - Myrtle Beach, SC
  • Average snowfall in August: 0"

The month with the highest snowfall is February (0.08").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in August
Myrtle Beach, SC

Average snowfall days in August - Myrtle Beach, SC
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in August
Myrtle Beach, SC

Average sea temperature in August - Myrtle Beach, SC
  • Average sea temperature in August: 82.9°F

The best month for swimming (with the highest average sea temperature) is August (82.9°F).
The coldest month (with the lowest average sea temperature) is March (57.7°F).

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Average daylight in August /
Average sunshine in August
Myrtle Beach, SC

Average daylight in August / Average sunshine in August - Myrtle Beach, SC
  • Average daylight in August: 13h and 22min

The month with the longest days is June (Average daylight: 14h and 22min).
The month with the shortest days is December (Average daylight: 9h and 58min).

  • Average sunshine in August: 10h and 54min

The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).

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Average sunshine days in August
Myrtle Beach, SC

Average sunshine days in August - Myrtle Beach, SC
  • Average sunshine days in August: 8.8 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (8.2 days).

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Average UV index in August
Myrtle Beach, SC

Average UV index in August - Myrtle Beach, SC
  • Average UV index in August: 7

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

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Average cloud cover in August
Myrtle Beach, SC

Average cloud cover in August - Myrtle Beach, SC
  • Average cloud cover in August: 27

The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is June (Cloud cover 25).

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Average visibility in August
Myrtle Beach, SC

Average visibility in August - Myrtle Beach, SC
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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