Nantucket Harbor - Pocomo Head Weather Forecast

    • 65
    • 70

    Decreasing Clouds

    • 58
    • 70

    Mostly Sunny

    • 59
    • 64

    Mostly Sunny

    • 60
    • 64

    Partly Sunny

    • 63
    • 67

    Partly Sunny

    • 64
    • 69

    Slight Chance Rain Showers

Today 18 Sep Nantucket

Mostly cloudy with a slight chance of Showers with patchy drizzle this Morning, then partly sunny with patchy drizzle this afternoon. Patchy fog. Highs in the lower 70s. Northeast Winds around 5 Mph, becoming northwest around 5 Mph this afternoon. Chance of rain 20 percent.

Tonight 18 Sep Nantucket

Partly cloudy. Patchy fog. Humid. Near steady temperature in the mid 60s. West Winds 5 to 10 Mph. Gusts up to 20 Mph after midnight.

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Nantucket Harbor - Pocomo Head Temperature Statistics

September Temperature

Nantucket, Nantucket Memorial Airport (4.3 miles)

  • Lowest 13 September, 2025

    48 °F

  • Average September

    64.1 °F

  • Highest 6 September, 2025

    75.9 °F

Climate (2020–Present)

Nantucket, Nantucket Memorial Airport (4.3 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    59.4 °F
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