Nantucket Harbor - Nantucket Weather Forecast

    • 61
    • 80

    Chance Rain Showers

    • 53
    • 72

    Chance Rain Showers

    • 60
    • 75

    Partly Sunny

    • 61
    • 76

    Chance Rain Showers

    • 62
    • 77

    Slight Chance Rain Showers

    • 64
    • 79

    Mostly Sunny

    • 64
    • 79

    Partly Sunny

Today 17 Aug Nantucket

Mostly sunny. Near steady temperature in the mid 70s. Southwest Winds around 15 Mph with Gusts up to 30 Mph.

Tonight 17 Aug Nantucket

Cloudy with a chance of Showers with a slight chance of Thunderstorms. Breezy with Lows in the lower 60s. Southwest Winds 10 to 15 Mph, increasing to north 20 to 25 Mph after midnight. Chance of rain 40 percent.

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Nantucket Harbor - Nantucket Temperature Statistics

August Temperature

Nantucket, Nantucket Memorial Airport (2.5 miles)

  • Lowest 3 August, 2025

    51.7 °F

  • Average August

    68.1 °F

  • Highest 12 August, 2025

    82.7 °F

Climate (2020–Present)

Nantucket, Nantucket Memorial Airport (2.5 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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