Weather in Marthas Vineyard, United States in August

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Visiting Marthas Vineyard, United States in August

August is one of the best months to visit Marthas Vineyard 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 cooler than the previous month and temperatures continue to drop into September. August has average maximum temperatures of 26°C (79°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 6.4 hours of sunshine per day.

August has total rainfall of 6.6cm (2.6inches) making it mostly dry with only intermittent light showers. There are only 14.4 days with some rainfall so you can still enjoy the beach on the majority of days.

Sea temperatures are a chilly 19°C (66°F). August is a little too cold to enjoy swimming in Marthas Vineyard for prolonged periods of time. The sea temperature in August is slightly warmer than the previous month.

Also consider visiting Marthas Vineyard in one of the other best months of June, July, September, for the best beach weather. Also consider one of our other suggestions for August.

Can you sunbathe in Marthas Vineyard in August?

Yes, August is a good time for sunbathing in Marthas Vineyard.

August has average maximum temperatures of 26°C (79°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 6.4 hours of sunshine per day. August has total rainfall of 6.6cm (2.6inches) making it mostly dry with only intermittent light showers. There are only 14.4 days with some rainfall so you can still enjoy the beach on the majority of days.

More about August temperature and sunshine.

Can you swim in Marthas Vineyard in August?

Probably not, August is a little too cold to enjoy swimming in Marthas Vineyard for prolonged periods of time with the sea water at 19°C (66°F).

More about August sea temperatures.

Is August a good time to holiday in Marthas Vineyard?

Yes, August is a good time for a holiday in Marthas Vineyard.

August has average maximum temperatures of 26°C (79°F) which is very warm and perfect for sunbathing on clear days. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 6.4 hours of sunshine per day. August has total rainfall of 6.6cm (2.6inches) making it mostly dry with only intermittent light showers. There are only 14.4 days with some rainfall so you can still enjoy the beach on the majority of days. Sea temperatures are a chilly 19°C (66°F). August is a little too cold to enjoy swimming in Marthas Vineyard for prolonged periods of time.

More about the August temperatures and sunshine.

Is Marthas Vineyard warm in August?

Yes, Marthas Vineyard is very warm and perfect for sunbathing on clear days in August.

The average maximum temperature in Marthas Vineyard in August is 26°C (79°F). The average maximum temperature is 26°C (80°) in the previous month and 23°C (73°F) in the next month.

The average temperature in Marthas Vineyard in August is 21°C (69°F). The average temperature is 22°C (71°F) in the previous month and 17°C (63°F) in the next month.

More info about the August temperatures and sunshine.

How sunny is Marthas Vineyard in August?

The average day light hours per day in Marthas Vineyard in August are 13.8. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 6.4 hours of sunshine per day.

More about August sunshine.

Temperature in Marthas Vineyard in August

The weather in August is marginally cooler than the previous month and temperatures continue to drop into September. The average maximum temperature in Marthas Vineyard in August is 26°C (79°F). The average maximum temperature is 26°C (80°F) in the previous month and 23°C (73°F) in the next month.

The average temperature in Marthas Vineyard in August is 21°C (69°F). The average temperature is 22°C (71°F) in the previous month and 17°C (63°F) in the next month.

The average minimum temperature in Marthas Vineyard in August is 16°C (60°F). The minimum temperature is 18°C (64°F) in the previous month and 12°C (53°F) in the next month.

Sunshine in Marthas Vineyard in August

The days in August are shorter than the previous month and days continue to get shorter into September. During August the average day light hours are 13.8 per day in Marthas Vineyard. The sunshine percentage is 46% making it quite sunny but with regular periods of cloudy and overcast skies. There are 6.4 hours of sunshine per day.

The ultraviolet index in Marthas Vineyard in August is typically 8.6 during August. An ultraviolet index reading of 8 to 10 indicates a very high risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 15 minutes. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly. 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 Marthas Vineyard in August

The average sea water temperature in Marthas Vineyard in August is 19°C (66.2°F) which is comfortable for swimming though some may prefer warmer water. The sea temperature in August is slightly warmer than the previous month.

Rainfall in Marthas Vineyard in August

August weather is slightly drier than the previous month. August has a few more days of rain than the previous month. The average total rainfall in Marthas Vineyard in August is 6.6cm (2.6inches) and on average there are 14.4 rainy days in August making it a pretty wet time to visit the beach.

Humidity in Marthas Vineyard in August

The maximum dew point (an indicator of humidity) in Marthas Vineyard in August is 19°C (67°F) which is somewhat uncomfortable for most people in cities but fine on a beach. The dew point is 20°C (69°F) in the previous month and 17°C (17°F) in the next month.

The average maximum relative humidity in Marthas Vineyard in August is typically 95.3%. The maximum relative humidity is 95.6% in the previous month and 94.4% in the next month.

The average relative humidity in Marthas Vineyard in August is typically 81.2%. The average relative humidity is 83.2% in the previous month and 79.1% in the next month.

Wind Speed in Marthas Vineyard in August

The average maximum wind speed in Marthas Vineyard in August is typically 23KM/H (14MPH). The average maximum wind speed is 24KM/H (15MPH) in the previous month and 25KM/H (16MPH) in the next month.

The average wind speed in Marthas Vineyard in August is typically 11KM/H (7MPH). The average wind speed is 12KM/H (8MPH) in the previous month and 12KM/H (8MPH) in the next month.

The average wind direction in Marthas Vineyard in August is from the South West.

Monthly Averages

Suggested Beaches in August

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