Nantucket Harbor Weather Forecast

    • 59
    • 75

    Mostly Sunny

    • 66
    • 76

    Mostly Sunny

    • 68
    • 79

    Mostly Sunny

    • 68
    • 81

    Slight Chance Rain Showers

    • 66
    • 80

    Chance Rain Showers

    • 67
    • 79

    Chance Rain Showers

Today 22 Jul Nantucket

Sunny. Near steady temperature in the lower 70s. Northeast Winds 5 to 10 Mph.

Tonight 22 Jul Nantucket

Mostly clear. Lows in the upper 50s. Southeast Winds around 5 Mph, becoming southwest around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nantucket Harbor Temperature Statistics

July Temperature

Nantucket, Nantucket Memorial Airport (2.5 miles)

  • Lowest 5 July, 2025

    54.6 °F

  • Average July

    70.1 °F

  • Highest 18 July, 2025

    82.7 °F

Climate (2020–Present)

Nantucket, Nantucket Memorial Airport (2.5 miles)

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  • Average Low 2020–2025

    47.7 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    59.4 °F
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