Nantucket Harbor - Pocomo Head Weather Forecast

    • 65
    • 73

    Rain Showers

    • 56
    • 73

    Chance Rain Showers

    • 60
    • 65

    Mostly Sunny

    • 63
    • 69

    Mostly Sunny

    • 64
    • 71

    Partly Sunny

    • 61
    • 71

    Slight Chance Rain

Today 13 Sep Nantucket

Partly sunny with a chance of Showers with isolated Thunderstorms in the Morning, then Showers with isolated Thunderstorms in the afternoon. Locally heavy rainfall possible in the afternoon. Humid with Highs in the lower 70s. Southeast Winds 10 to 15 Mph. Chance of rain near 100 percent.

Tonight 13 Sep Nantucket

Mostly cloudy. Patchy fog. A chance of Showers in the evening. Humid with Lows in the mid 60s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

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Nantucket Harbor - Pocomo Head Temperature Statistics

September Temperature

Nantucket, Nantucket Memorial Airport (4.3 miles)

  • Lowest 6 September, 2026

    55 °F

  • Average September

    67.2 °F

  • Highest 4 September, 2026

    78.1 °F

Climate (2021–2026)

Nantucket, Nantucket Memorial Airport (4.3 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    58.8 °F
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