Lieutenant Island Weather Forecast

    • 48
    • 54

    Sunny

    • 50
    • 57

    Mostly Cloudy

    • 48
    • 57

    Breezy

    • 49
    • 57

    Chance Rain Showers

    • 47
    • 56

    Chance Rain Showers

    • 46
    • 54

    Partly Sunny

    • 47
    • 53

    Partly Sunny

Today 18 Oct Barnstable

Sunny. Near steady temperature in the lower 50s. Northeast Winds 5 to 10 Mph.

Tonight 18 Oct Barnstable

Clear. Lows in the lower 40s. East Winds 5 to 10 Mph.

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Lieutenant Island Temperature Statistics

October Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 7 October, 2026

    41 °F

  • Average October

    58.6 °F

  • Highest 14 October, 2026

    72 °F

Climate (2021–2026)

Chatham, Chatham Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    59.6 °F
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