Siasconset Weather Forecast

    • 44
    • 58

    Mostly Cloudy

    • 51
    • 60

    Rain Showers

    • 54
    • 58

    Rain Showers

    • 53
    • 65

    Chance Rain Showers

    • 53
    • 64

    Partly Sunny

    • 52
    • 67

    Partly Sunny

Today 22 May Nantucket

Mostly sunny. Highs in the upper 50s. Northeast Winds 10 to 15 Mph.

Tonight 22 May Nantucket

Mostly cloudy. Lows in the lower 40s. East Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Siasconset Temperature Statistics

May Temperature

Nantucket, Nantucket Memorial Airport (4.3 miles)

  • Lowest 2 May, 2026

    44.1 °F

  • Average May

    53 °F

  • Highest 17 May, 2026

    69.1 °F

Climate (2021–Present)

Nantucket, Nantucket Memorial Airport (4.3 miles)

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  • Average Low 2021–2026

    47 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    59 °F
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