August weather forecast
Cape Town, South Africa

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Cape Town, South Africa, with the surrounding calm clear waters and several mountains
Cape Town, South Africa, with the surrounding calm clear waters and several mountains

Weather in August

August in Cape Town is a turning point as the city slowly edges out of the winter season. The weather maintains a steady cold, but a noticeable reduction in rain gives the city a chance to dry up and prepare for the impending spring. Simultaneously, the budding flower landscapes across the city provide a worthwhile spectacle for nature lovers. The days lengthen and warmth increases gradually towards the end of the month, setting forth a smooth transition into spring by September.

Temperature

August brings the lowest temperatures, with an average high of 16.6°C (61.9°F) and an average low of 10.2°C (50.4°F).

Humidity

June, August and September, with an average relative humidity of 74%, are the most humid months.

Rainfall

In Cape Town, in August, it is raining for 13.7 days, with typically 70mm (2.76") of accumulated precipitation. In Cape Town, South Africa, during the entire year, the rain falls for 111 days and collects up to 435mm (17.13") of precipitation.

Sea temperature

The months with the coldest seawater in Cape Town are July through September, with an average sea temperature of 15.3°C (59.5°F).
Note: Swimming is not a pleasant activity for most when the water temperature is 15.3°C (59.5°F). As the water temperature drops from 21°C (69.8°F) to 15°C (59°F), breathing becomes more difficult to control.

Daylight

In Cape Town, the average length of the day in August is 10h and 54min.
On the first day of the month, sunrise is at 07:38 and sunset at 18:07. On the last day of August, sunrise is at 07:05 and sunset at 18:27 SAST.

Sunshine

In August, the average sunshine in Cape Town is 7.9h.

UV index

The months with the lowest UV index in Cape Town, South Africa, are May through September, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 in August interprets into the following advice:
Put precautions into practice - Guidance to elude sunburn is provided. Around midday, solar radiation is most harmful; hence, exposure should be limited. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
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Frequently asked questions

What is the coldest time of year in Cape Town?

With its average high temperature of 16.6°C (61.9°F) and a low of 10.2°C (50.4°F), August is regarded as the coldest month in Cape Town, South Africa.

What is the temperature in August in Cape Town?

An average high-temperature, in August, in Cape Town, is 16.6°C (61.9°F) and the average low-temperature is 10.2°C (50.4°F).

What are the most humid months in Cape Town?

June, August and September, with an average relative humidity of 74%, are most humid months in Cape Town.

What is the average humidity in August in Cape Town?

In August, the average relative humidity in Cape Town, South Africa, is 74%.

How many days does it rain in August in Cape Town?

In Cape Town, during August, the rain falls for 13.7 days and regularly aggregates up to 70mm (2.76") of precipitation.

When is the sea coldest in Cape Town?

July through September, with an average sea temperature of 15.3°C (59.5°F), are months with the coldest seawater.

What is the sea water temperature in August in Cape Town?

In Cape Town, South Africa, in August, the average water temperature is 15.3°C (59.5°F). For swimming, a surface water temperature of 15.3°C (59.5°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Cape Town have in August?

In August, the average day length in Cape Town is 10h and 54min.

When is the sunrise / sunset in August in Cape Town?

In August, on the first day of the month, sunrise is at 07:38 and sunset at 18:07. On the last day of the month, in Cape Town, sunrise is at 07:05 and sunset at 18:27 SAST.

How long on average sun shines in August in Cape Town?

In Cape Town, South Africa, the average sunshine duration in August is 7.9h.

What is the month with the lowest UV index in Cape Town?

The months with the lowest UV index in Cape Town, South Africa, are May through September, with an average maximum UV index of 4.

What is the UV index reading in August in Cape Town?

The average daily maximum UV index in August in Cape Town is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.

Average temperature in August
Cape Town, South Africa

Average temperature in August - Cape Town, South Africa
  • Average high temperature in August: 16.6°C

The warmest month (with the highest average high temperature) is February (26.1°C).
The month with the lowest average high temperature is August (16.6°C).

  • Average low temperature in August: 10.2°C

The month with the highest average low temperature is January (17.7°C).
The coldest months (with the lowest average low temperature) are July and August (10.2°C).

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Average pressure in August
Cape Town, South Africa

Average pressure in August - Cape Town, South Africa
  • Average pressure in August: 1020.4mbar

The month with the highest atmospheric pressure is July (1022mbar).
The month with the lowest atmospheric pressure is February (1013.4mbar).

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Average wind speed in August
Cape Town, South Africa

Average wind speed in August - Cape Town, South Africa
  • Average wind speed in August: 14.4km/h

The windiest month (with the highest average wind speed) is January (17.6km/h).
The calmest month (with the lowest average wind speed) is May (13.4km/h).

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Average humidity in August
Cape Town, South Africa

Average humidity in August - Cape Town, South Africa
  • Average humidity in August: 74%

The months with the highest relative humidity are June, August and September (74%).
The months with the lowest relative humidity are February, April and December (68%).

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Average rainfall in August
Cape Town, South Africa

Average rainfall in August - Cape Town, South Africa
  • Average rainfall in August: 70mm

The wettest month (with the highest rainfall) is June (98mm).
The driest month (with the least rainfall) is February (7mm).

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Average rainfall days in August
Cape Town, South Africa

Average rainfall days in August - Cape Town, South Africa
  • Average rainfall days in August: 13.7 days

The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is February (4.9 days).

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Average sea temperature in August
Cape Town, South Africa

Average sea temperature in August - Cape Town, South Africa
  • Average sea temperature in August: 15.3°C

The best month for swimming (with the highest average sea temperature) is January (18.5°C).
The coldest months (with the lowest average sea temperature) are July, August and September (15.3°C).

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Average daylight in August /
Average sunshine in August
Cape Town, South Africa

Average daylight in August / Average sunshine in August - Cape Town, South Africa
  • Average daylight in August: 10h and 5min

The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).

  • Average sunshine in August: 7h and 5min

The month with the most sunshine is December (Average sunshine: 11h and 6min).
The month with the least sunshine is June (Average sunshine: 6h and 0min).

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Average sunshine days in August
Cape Town, South Africa

Average sunshine days in August - Cape Town, South Africa
  • Average sunshine days in August: 15.3 days

The month with the most sunshine days is January (23.1 days).
The month with the least sunshine days is June (14.6 days).

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Average UV index in August
Cape Town, South Africa

Average UV index in August - Cape Town, South Africa
  • Average UV index in August: 4

The months with the highest UV index are January, February and December (UV index 6).
The months with the lowest UV index are May, June, July, August and September (UV index 4).

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Average cloud cover in August
Cape Town, South Africa

Average cloud cover in August - Cape Town, South Africa
  • Average cloud cover in August: 32

The month with the most cloud cover is June (Cloud cover 34).
The month with the least cloud cover is February (Cloud cover 15).

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Average visibility in August
Cape Town, South Africa

Average visibility in August - Cape Town, South Africa
  • Average visibility in August: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Cape Town, South Africa

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