Martha's Vineyard weather in August 2025

Expect 25°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Martha's Vineyard in August. Check more long-term weather averages for Martha's Vineyard in August before you book your next holiday to Massachusetts in 2025/2026.

  • 25°C maximum daytime temperature in August in Martha's Vineyard25
    25°C max day temperature
  • 8 hours of sunshine per day
  • 10 days with some rainfall in August in Martha's Vineyard10
    10 days with some rainfall
  • 17°C minimum night-time temperature in August in Martha's Vineyard17
    17°C min night temperature
  • 14 hours of daylight per day in August in Martha's Vineyard14
    14 hours of daylight per day
  • Low heat & humidity in August in Martha's VineyardL
    Low heat & humidity
  • 104 mm monthly rainfall in August in Martha's Vineyard104
    104 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Martha's Vineyard8
    8 (Very High) UV index
  • 20°C sea temperature in August in Martha's Vineyard20
    20°C sea temperature

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Martha's Vineyard by month

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The August weather guide for Massachusetts (Martha's Vineyard) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Martha's Vineyard in August?

Daytime temperatures usually reach 25°C in Martha's Vineyard in August with low heat and humidity, falling to 17°C at night.

How sunny is it in Martha's Vineyard in August?

There are normally 8 hours of bright sunshine each day in Martha's Vineyard in August - that's 58% of daylight hours.

How warm is the sea around Martha's Vineyard in August?

The average sea temperature around Martha's Vineyard in August is 20°C.

Does it rain in Martha's Vineyard in August?

There are usually 10 days with some rain in Martha's Vineyard in August and the average monthly rainfall is 104mm.

What is the chance of a hurricane in Martha's Vineyard in August?

On average less than 1 day in August in Martha's Vineyard is likely to be affected by the passage of one or more tropical storms.

Martha's Vineyard August sunrise & sunset times

Browse the sunrise and sunset times for Martha's Vineyard in August 2025. Select a month to view Martha's Vineyard sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 04:38 18:59
Saturday, 16th August 2025 04:53 18:40
Sunday, 31st August 2025 05:08 18:17

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