Siasconset Weather Forecast

    • 40
    • 46

    Rain

    • 37
    • 44

    Mostly Cloudy

    • 37
    • 46

    Rain Likely

    • 31
    • 42

    Chance Rain

    • 33
    • 39

    Partly Sunny

    • 33
    • 43

    Chance Rain

    • 36
    • 44

    Chance Rain

Today 20 Mar Nantucket

Mostly sunny. Near steady temperature in the mid 40s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 20 Mar Nantucket

Rain. Patchy fog after midnight. Near steady temperature in the lower 40s. South Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Siasconset Temperature Statistics

March Temperature

Nantucket, Nantucket Memorial Airport (4.3 miles)

  • Lowest 3 March, 2026

    14 °F

  • Average March

    39 °F

  • Highest 11 March, 2026

    55 °F

Climate (2021–Present)

Nantucket, Nantucket Memorial Airport (4.3 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    59.1 °F
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