Joseph Sylvia State Beach Weather Forecast

    • 67
    • 80

    Decreasing Clouds

    • 70
    • 79

    Chance Rain Showers

    • 66
    • 80

    Chance Rain Showers

    • 63
    • 77

    Mostly Sunny

    • 64
    • 76

    Mostly Sunny

    • 68
    • 77

    Partly Sunny

Today 18 Jul Dukes

Partly sunny. Near steady temperature in the upper 70s. North Winds 5 to 10 Mph.

Tonight 18 Jul Dukes

Partly cloudy in the Evening, then clearing. Cooler with Lows in the mid 50s. South Winds 5 to 10 Mph.

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Joseph Sylvia State Beach Temperature Statistics

July Temperature

Marthas Vineyard Airport (3.7 miles)

  • Lowest 5 July, 2025

    47.6 °F

  • Average July

    71.3 °F

  • Highest 8 July, 2025

    85.6 °F

Climate (2020–Present)

Marthas Vineyard Airport (3.7 miles)

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  • Average Low 2020–2025

    44.8 °F

  • Average 2020–2025

    53.3 °F

  • Average High 2020–2025

    61.1 °F
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