Siasconset Weather Forecast

    • 66
    • 74

    Rain Showers

    • 68
    • 75

    Rain Showers Likely

    • 65
    • 76

    Mostly Sunny

    • 66
    • 75

    Mostly Sunny

    • 67
    • 75

    Partly Sunny

    • 67
    • 76

    Chance Rain Showers

Today 22 Aug Nantucket

Cloudy with a 20 percent chance of Showers. Humid with Highs in the mid 70s. North Winds 10 to 15 Mph.

Tonight 22 Aug Nantucket

Cloudy. A chance of Showers. Patchy fog. Humid with Lows in the upper 60s. West Winds 5 to 10 Mph, becoming southeast after midnight. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Siasconset Temperature Statistics

August Temperature

Nantucket, Nantucket Memorial Airport (4.3 miles)

  • Lowest 16 August, 2026

    57 °F

  • Average August

    71.5 °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 °F

  • Average High 2021–2026

    58.9 °F
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