Joseph Sylvia State Beach Weather Forecast

    • 65
    • 72

    Rain Showers Likely

    • 67
    • 73

    Rain Showers

    • 70
    • 77

    Chance Rain Showers

    • 66
    • 78

    Mostly Sunny

    • 67
    • 76

    Mostly Sunny

    • 68
    • 78

    Partly Sunny

Today 21 Aug Dukes

Showers likely with isolated Thunderstorms, then Showers likely. Patchy fog. Near steady temperature in the lower 70s. Northeast Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 21 Aug Dukes

Cloudy with a 40 percent chance of Showers. Patchy fog. Humid. Near steady temperature in the upper 60s. Northeast Winds 15 to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Joseph Sylvia State Beach Temperature Statistics

August Temperature

Marthas Vineyard Airport (3.7 miles)

  • Lowest 10 August, 2026

    61 °F

  • Average August

    73.6 °F

  • Highest 7 August, 2026

    86 °F

Climate (2021–2026)

Marthas Vineyard Airport (3.7 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    60.6 °F
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