Lieutenant Island Weather Forecast

    • 42
    • 48

    Chance Rain Showers

    • 48
    • 53

    Rain Showers Likely

    • 49
    • 58

    Mostly Cloudy

    • 47
    • 58

    Chance Rain Showers

    • 47
    • 54

    Slight Chance Rain Showers

    • 46
    • 56

    Slight Chance Rain Showers

Today 12 Apr Barnstable

Mostly sunny. Near steady temperature in the upper 40s. Southeast Winds 5 to 10 Mph.

Tonight 12 Apr Barnstable

Mostly cloudy. Isolated Showers in the Evening, then scattered Showers after midnight. Lows in the lower 40s. South Winds 5 to 10 Mph, increasing to 15 to 20 Mph after midnight. Gusts up to 30 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lieutenant Island Temperature Statistics

April Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 9 April, 2026

    27 °F

  • Average April

    42.3 °F

  • Highest 4 April, 2026

    54 °F

Climate (2021–Present)

Chatham, Chatham Municipal Airport (14.3 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    59.8 °F
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