Lieutenant Island Weather Forecast

    • 60
    • 65

    Patchy Fog

    • 65
    • 74

    Partly Sunny

    • 69
    • 80

    Partly Sunny

    • 71
    • 86

    Slight Chance Rain Showers

    • 72
    • 90

    Mostly Sunny

    • 69
    • 88

    Partly Sunny

Today 28 Jun Barnstable

Mostly cloudy in the Morning, then becoming mostly sunny. Patchy fog in the morning. Highs in the lower 70s. East Winds 5 to 10 Mph.

Tonight 28 Jun Barnstable

Mostly cloudy. Patchy fog. Near steady temperature in the mid 60s. East Winds around 5 Mph.

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Lieutenant Island Temperature Statistics

June Temperature

Chatham, Chatham Municipal Airport (14.3 miles)

  • Lowest 2 June, 2026

    42.1 °F

  • Average June

    65.8 °F

  • Highest 13 June, 2026

    84 °F

Climate (2021–2026)

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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