Lieutenant Island Weather Forecast

    • 56
    • 63

    Rain Showers Likely

    • 50
    • 66

    Partly Sunny

    • 52
    • 58

    Sunny

    • 57
    • 61

    Mostly Sunny

    • 56
    • 65

    Mostly Sunny

    • 54
    • 63

    Mostly Sunny

Today 4 Oct Barnstable

Mostly cloudy with a 50 percent chance of Showers. Near steady temperature in the lower 60s. East Winds 5 to 10 Mph.

Tonight 4 Oct Barnstable

Cloudy. Showers Likely, mainly in the evening. Patchy fog. Near steady temperature in the upper 50s. East Winds around 5 Mph, becoming north after midnight. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lieutenant Island Temperature Statistics

October Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 1 October, 2026

    60.1 °F

  • Average October

    65.4 °F

  • Highest 2 October, 2026

    71.1 °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

    59.7 °F
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