Portsmouth Island Weather Forecast

    • 61
    • 72

    Partly Sunny

    • 67
    • 76

    Becoming Sunny

    • 72
    • 77

    Sunny

    • 74
    • 77

    Sunny

    • 75
    • 78

    Mostly Sunny

    • 75
    • 79

    Partly Sunny

    • 74
    • 79

    Partly Sunny

Today 26 Sep East Carteret

Mostly sunny. A chance of Showers in the afternoon. Highs in the lower 80s. Chance of rain 30 percent.

Tonight 26 Sep East Carteret

Mostly clear. Lows in the lower 60s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Real-Time

Portsmouth Island Temperature Statistics

September Temperature

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

  • Lowest 18 September, 2026

    68 °F

  • Average September

    79.6 °F

  • Highest 2 September, 2026

    93 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    62.7 °F

  • Average 2021–2026

    68.2 °F

  • Average High 2021–2026

    74.3 °F
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