Portsmouth Island Weather Forecast

    • 80
    • 90

    Chance Thunderstorms

    • 82
    • 88

    Chance Thunderstorms

    • 78
    • 86

    Rain Showers Likely

    • 78
    • 83

    Partly Sunny

    • 78
    • 83

    Mostly Sunny

    • 79
    • 84

    Mostly Sunny

Today 19 Jul East Carteret

Mostly sunny. A slight chance of Showers and Thunderstorms this Morning, then a chance of Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent. Heat index Values up to 111.

Tonight 19 Jul East Carteret

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows around 80. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent. Heat index Values up to 104 early in the evening.

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Portsmouth Island Temperature Statistics

July Temperature

Piney Island, Bt-11 Bombing Range (21.7 miles)

  • Lowest 11 July, 2025

    72 °F

  • Average July

    81.1 °F

  • Highest 10 July, 2025

    89.1 °F

Climate (2020–Present)

Piney Island, Bt-11 Bombing Range (21.7 miles)

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  • Average Low 2020–2025

    63.2 °F

  • Average 2020–2025

    68.7 °F

  • Average High 2020–2025

    74.8 °F
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