Nantucket Harbor - First Point Weather Forecast

    • 17
    • 29

    Partly Sunny

    • 33
    • 41

    Mostly Cloudy

    • 31
    • 43

    Partly Sunny

    • 12
    • 36

    Mostly Cloudy

    • 14
    • 20

    Chance Snow

    • 22
    • 28

    Snow Likely

    • 18
    • 29

    Chance Snow

Today 20 Jan Nantucket

Sunny. A chance of light freezing spray. Highs in the upper 20s. West Winds 15 to 20 Mph with Gusts up to 35 Mph.

Tonight 20 Jan Nantucket

Partly cloudy this Evening, then becoming mostly clear. Lows around 18. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Real-Time

Nantucket Harbor - First Point Temperature Statistics

January Temperature

Nantucket, Nantucket Memorial Airport (2.5 miles)

  • Lowest 1 January, 2026

    19 °F

  • Average January

    35.2 °F

  • Highest 9 January, 2026

    48 °F

Climate (2021–Present)

Nantucket, Nantucket Memorial Airport (2.5 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    53.3 °F

  • Average High 2021–2026

    59.2 °F
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