Weather in Kauai Island, United States in August

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Visiting Kauai Island, United States in August

August is one of the best months to visit Kauai Island for the best beach weather. It has the most sunshine and best sunbathing and swimming conditions of the year.

The weather in August is marginally warmer than the previous month and temperatures continue to rise slightly into September. August has average maximum temperatures of 29°C (85°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.6 hours of sunshine per day.

August has total rainfall of 4.6cm (1.8inches) making it mostly dry with very rare light showers although there are 18.8 days with some rainfall, so on the days it does rain it is only light and intermittent and shouldn't affect your beach enjoyment too much.

Sea temperatures are a very warm 27°C (81°F). August is an excellent month for swimming in Kauai Island with very comfortable temperatures for bathing all day. The sea temperature in August is marginally warmer than the previous month and temperatures continue to rise slightly into September.

Also consider visiting Kauai Island in one of the other best months of April, May, September, for the best beach weather. Also consider one of our other suggestions for August.

Can you sunbathe in Kauai Island in August?

Yes, August is a good time for sunbathing in Kauai Island.

August has average maximum temperatures of 29°C (85°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.6 hours of sunshine per day. August has total rainfall of 4.6cm (1.8inches) making it mostly dry with very rare light showers although there are 18.8 days with some rainfall, so on the days it does rain it is only light and intermittent and shouldn't affect your beach enjoyment too much.

More about August temperature and sunshine.

Can you swim in Kauai Island in August?

Yes, August is an excellent month for swimming in Kauai Island with very warm sea temperatures 27°C (81°F).

More about August sea temperatures.

Is August a good time to holiday in Kauai Island?

Yes, August is a good time for a holiday in Kauai Island.

August has average maximum temperatures of 29°C (85°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.6 hours of sunshine per day. August has total rainfall of 4.6cm (1.8inches) making it mostly dry with very rare light showers although there are 18.8 days with some rainfall, so on the days it does rain it is only light and intermittent and shouldn't affect your beach enjoyment too much. Sea temperatures are a very warm 27°C (81°F). August is an excellent month for swimming in Kauai Island with very comfortable temperatures for bathing all day.

More about the August temperatures and sunshine.

Is Kauai Island warm in August?

Yes, Kauai Island is very warm and perfect for sunbathing on clear days in August.

The average maximum temperature in Kauai Island in August is 29°C (85°F). The average maximum temperature is 29°C (84°) in the previous month and 30°C (85°F) in the next month.

The average temperature in Kauai Island in August is 27°C (80°F). The average temperature is 26°C (79°F) in the previous month and 27°C (80°F) in the next month.

More info about the August temperatures and sunshine.

How sunny is Kauai Island in August?

The average day light hours per day in Kauai Island in August are 12.9. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.6 hours of sunshine per day.

More about August sunshine.

Temperature in Kauai Island in August

The weather in August is marginally warmer than the previous month and temperatures continue to rise slightly into September. The average maximum temperature in Kauai Island in August is 29°C (85°F). The average maximum temperature is 29°C (84°F) in the previous month and 30°C (85°F) in the next month.

The average temperature in Kauai Island in August is 27°C (80°F). The average temperature is 26°C (79°F) in the previous month and 27°C (80°F) in the next month.

The average minimum temperature in Kauai Island in August is 23°C (74°F). The minimum temperature is 23°C (74°F) in the previous month and 23°C (74°F) in the next month.

Sunshine in Kauai Island in August

The days in August are marginally shorter than the previous month and days continue to get slightly shorter into September. August has marginally more hours of sunshine than the previous month and hours of sunshine continue to rise slightly into September. During August the average day light hours are 12.9 per day in Kauai Island. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.6 hours of sunshine per day.

The ultraviolet index in Kauai Island in August is typically 12.9 during August. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in Kauai Island in August

The average sea water temperature in Kauai Island in August is 27.4°C (81.3°F) which is very warm and ideal for relaxing and swimming for the whole day. The sea temperature in August is marginally warmer than the previous month and temperatures continue to rise slightly into September.

Rainfall in Kauai Island in August

August weather is slightly wetter than the previous month. August has a few more days of rain than the previous month. The average total rainfall in Kauai Island in August is 4.6cm (1.8inches) and on average there are 18.8 rainy days in August making it a wet time to visit the beach.

Humidity in Kauai Island in August

The maximum dew point (an indicator of humidity) in Kauai Island in August is 21°C (70°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan. The dew point is 21°C (70°F) in the previous month and 22°C (22°F) in the next month.

The average maximum relative humidity in Kauai Island in August is typically 79.4%. The maximum relative humidity is 81.1% in the previous month and 80.6% in the next month.

The average relative humidity in Kauai Island in August is typically 68.4%. The average relative humidity is 69.8% in the previous month and 69.3% in the next month.

Wind Speed in Kauai Island in August

The average maximum wind speed in Kauai Island in August is typically 29KM/H (18MPH). The average maximum wind speed is 29KM/H (18MPH) in the previous month and 28KM/H (17MPH) in the next month.

The average wind speed in Kauai Island in August is typically 18KM/H (11MPH). The average wind speed is 18KM/H (11MPH) in the previous month and 17KM/H (10MPH) in the next month.

The average wind direction in Kauai Island in August is from the South East.

Monthly Averages

Suggested Beaches in August

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Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.