August weather forecast
South Beach, FL

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Weather in August

The last month of the summer, August, is also a hot month in South Beach, Florida, with temperature in the range of an average high of 87.4°F (30.8°C) and an average low of 78.6°F (25.9°C).

Temperature

In South Beach, temperatures reach their average annual highs in August, measuring 87.4°F (30.8°C) and a minimum average of 78.6°F (25.9°C).

Heat index

Throughout August, the heat index is estimated at an extremely hot 104°F (40°C). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

June through August, with an average relative humidity of 79%, are the most humid months.

Rainfall

The month with the most rainfall is August, when the rain falls for 20.2 days and typically aggregates up to 2.48" (63mm) of precipitation.

Ocean temperature

With an average ocean temperature of 84.9°F (29.4°C), August is the month with the warmest seawater in South Beach, Florida.
Note: In water temperatures ranging between 77°F (25°C) and 84.2°F (29°C), activities such as swimming and diving become highly pleasurable for long durations.

Daylight

In South Beach, Florida, the average length of the day in August is 13h and 5min.
On the first day of the month, sunrise is at 6:45 am and sunset at 8:10 pm. On the last day of August, in South Beach, Florida, sunrise is at 7:00 am and sunset at 7:42 pm EDT.

Sunshine

In August, the average sunshine in South Beach is 10.8h.

UV index

The months with the highest UV index in South Beach 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 ordinary individuals.
Note: The UV index of 7 in August translates into these instructions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Opt for tightly woven and loose clothing to enhance protection from the Sun. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the hottest in South Beach?

South Beach, Florida, reaches its average highest temperatures in August, measuring 87.4°F (30.8°C) at the peak and 78.6°F (25.9°C) at the lowest.

How hot is it in South Beach in August?

South Beach in August has an average high-temperature of 87.4°F (30.8°C) and an average low-temperature of 78.6°F (25.9°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in August is estimated at 104°F (40°C).

What is the most humid month in South Beach?

The months with the highest humidity in South Beach, Florida, are June through August, with an average relative humidity of 79%.

What is the average humidity in August in South Beach?

In South Beach, the average relative humidity in August is 79%.

What is the wettest month in South Beach?

The month with the most rainfall in South Beach, Florida, is August, when the rain falls for 20.2 days and typically aggregates up to 2.48" (63mm) of precipitation.

How much does it rain in South Beach in August?

In South Beach, Florida, in August, during 20.2 rainfall days, 2.48" (63mm) of precipitation is typically accumulated.

When is the ocean warmest in South Beach?

August is the month with the warmest seawater in South Beach, Florida, with an average ocean temperature of 84.9°F (29.4°C).

What is the water temperature in August in South Beach?

In South Beach, Florida, in August, the average water temperature is 84.9°F (29.4°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 South Beach?

In August, the average day length is 13h and 5min.

When is the sunrise / sunset in August in South Beach?

In August, on the first day of the month, sunrise is at 6:45 am and sunset at 8:10 pm. On the last day of the month, in South Beach, sunrise is at 7:00 am and sunset at 7:42 pm EDT.

How long on average sun shines in August in South Beach?

The average sunshine duration in August in South Beach, Florida, is 10.8h.

What is the month with the highest UV index in South Beach?

The months with the highest UV index are May through September, with an average maximum UV index of 7.

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

In August, the average daily maximum UV index is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in August
South Beach, FL

Average temperature in August - South Beach, FL
  • Average high temperature in August: 87.4°F

The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is January (70.2°F).

  • Average low temperature in August: 78.6°F

The month with the highest average low temperature is August (78.6°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).

Average pressure in August
South Beach, FL

Average pressure in August - South Beach, FL
  • Average pressure in August: 30"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).

Average wind speed in August
South Beach, FL

Average wind speed in August - South Beach, FL
  • Average wind speed in August: 7mph

The windiest months (with the highest average wind speed) are January and November (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).

Average humidity in August
South Beach, FL

Average humidity in August - South Beach, FL
  • Average humidity in August: 79%

The months with the highest relative humidity are June, July and August (79%).
The month with the lowest relative humidity is March (72%).

Average rainfall in August
South Beach, FL

Average rainfall in August - South Beach, FL
  • Average rainfall in August: 2.48"

The wettest month (with the highest rainfall) is August (2.48").
The driest month (with the least rainfall) is February (0.39").

Average rainfall days in August
South Beach, FL

Average rainfall days in August - South Beach, FL
  • Average rainfall days in August: 20.2 days

The month with the highest number of rainy days is August (20.2 days).
The month with the least rainy days is February (7.7 days).

Average sea temperature in August
South Beach, FL

Average sea temperature in August - South Beach, FL
  • Average sea temperature in August: 84.8°F

The best month for swimming (with the highest average sea temperature) is August (84.8°F).
The coldest months (with the lowest average sea temperature) are January and February (72.3°F).

Average daylight in August /
Average sunshine in August
South Beach, FL

Average daylight in August / Average sunshine in August - South Beach, FL
  • Average daylight in August: 13h and 1min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in August: 10h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).

Average sunshine days in August
South Beach, FL

Average sunshine days in August - South Beach, FL
  • Average sunshine days in August: 5.1 days

The month with the most sunshine days is March (19.5 days).
The month with the least sunshine days is August (5.1 days).

Average UV index in August
South Beach, FL

Average UV index in August - South Beach, FL
  • Average UV index in August: 7

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February and December (UV index 5).

Average cloud cover in August
South Beach, FL

Average cloud cover in August - South Beach, FL
  • Average cloud cover in August: 27

The month with the most cloud cover is November (Cloud cover 36).
The months with the least cloud cover are May and August (Cloud cover 27).

Average visibility in August
South Beach, FL

Average visibility in August - South Beach, FL
  • 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).

South Beach, Florida, USA

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