Squam Weather Forecast

    • 58
    • 74

    Becoming Sunny

    • 62
    • 73

    Mostly Sunny

    • 66
    • 70

    Rain Showers Likely

    • 62
    • 72

    Partly Sunny

    • 61
    • 68

    Mostly Sunny

    • 64
    • 72

    Partly Sunny

Today 11 Sep Nantucket

Mostly sunny. Highs in the mid 70s. North Winds 10 to 15 Mph, becoming west in the afternoon.

Tonight 11 Sep Nantucket

Partly cloudy. Near steady temperature in the upper 60s. Northwest Winds 5 to 10 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Squam Temperature Statistics

September Temperature

Nantucket, Nantucket Memorial Airport (5.6 miles)

  • Lowest 6 September, 2026

    55 °F

  • Average September

    66.5 °F

  • Highest 4 September, 2026

    78.1 °F

Climate (2021–2026)

Nantucket, Nantucket Memorial Airport (5.6 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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