Nantucket Weather Forecast

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    • 66

    Rain Showers

    • 56
    • 66

    Rain Showers Likely

    • 56
    • 64

    Breezy

    • 56
    • 64

    Chance Rain Showers

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    Chance Rain Showers

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    • 65

    Chance Rain Showers

Today 20 Sep Nantucket

Partly sunny in the Morning, then mostly cloudy with Showers likely in the afternoon. Patchy fog in the afternoon. Highs in the mid 60s. Southeast Winds 10 to 15 Mph. Chance of rain 70 percent.

Tonight 20 Sep Nantucket

Showers. Patchy fog. Not as cool. Near steady temperature in the lower 60s. East Winds 10 to 15 Mph. Chance of rain near 100 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nantucket Temperature Statistics

September Temperature

Nantucket, Nantucket Memorial Airport (2.5 miles)

  • Lowest 15 September, 2026

    50 °F

  • Average September

    66.4 °F

  • Highest 4 September, 2026

    78.1 °F

Climate (2021–2026)

Nantucket, Nantucket Memorial Airport (2.5 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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