Lieutenant Island Weather Forecast

    • 51
    • 58

    Chance Rain

    • 53
    • 53

    Rain

    • 54
    • 64

    Chance Rain

    • 57
    • 69

    Partly Sunny

    • 55
    • 72

    Slight Chance Rain Showers

    • 52
    • 66

    Slight Chance Rain Showers

    • 52
    • 65

    Slight Chance Rain Showers

Today 23 May Barnstable

Cloudy. Near steady temperature in the lower 60s. East Winds 5 to 10 Mph.

Tonight 23 May Barnstable

Cloudy. A chance of rain after midnight. Lows around 50. Southeast Winds 5 to 10 Mph. Gusts up to 20 Mph after midnight. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lieutenant Island Temperature Statistics

May Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 8 May, 2026

    42.1 °F

  • Average May

    54.8 °F

  • Highest 20 May, 2026

    72 °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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