Nantucket Harbor - Third Point Weather Forecast

    • 70
    • 78

    Rain Showers

    • 68
    • 79

    Rain Showers

    • 67
    • 77

    Chance Rain Showers

    • 67
    • 75

    Partly Sunny

    • 67
    • 74

    Partly Sunny

    • 68
    • 74

    Partly Sunny

Today 21 Jul Nantucket

Partly sunny. A slight chance of Showers in the afternoon. Humid with Highs in the upper 70s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 21 Jul Nantucket

Showers with a chance of Thunderstorms. Breezy with Lows in the upper 60s. South Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain near 100 percent.

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Nantucket Harbor - Third Point Temperature Statistics

July Temperature

Nantucket, Nantucket Memorial Airport (3.7 miles)

  • Lowest 12 July, 2026

    55.9 °F

  • Average July

    70.1 °F

  • Highest 3 July, 2026

    87.1 °F

Climate (2021–2026)

Nantucket, Nantucket Memorial Airport (3.7 miles)

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  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    59 °F
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