Siasconset Weather Forecast

    • 59
    • 73

    Mostly Sunny

    • 67
    • 76

    Rain Showers Likely

    • 67
    • 79

    Rain Showers Likely

    • 67
    • 75

    Mostly Sunny

    • 70
    • 78

    Slight Chance Rain Showers

    • 67
    • 80

    Chance Rain Showers

Today 15 Aug Nantucket

Sunny. Highs in the mid 70s. North Winds 5 to 10 Mph.

Tonight 15 Aug Nantucket

Mostly clear. Lows in the upper 50s. Southeast Winds around 5 Mph, becoming southwest around 5 Mph after midnight.

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Siasconset Temperature Statistics

August Temperature

Nantucket, Nantucket Memorial Airport (4.3 miles)

  • Lowest 5 August, 2026

    62.1 °F

  • Average August

    72.5 °F

  • Highest 7 August, 2026

    80.1 °F

Climate (2021–2026)

Nantucket, Nantucket Memorial Airport (4.3 miles)

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  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    58.9 °F
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