Onslow Beach Weather Forecast

    • 77
    • 89

    Rain Showers Likely

    • 74
    • 84

    Chance Thunderstorms

    • 73
    • 83

    Chance Rain Showers

    • 74
    • 83

    Mostly Sunny

    • 75
    • 84

    Mostly Sunny

    • 77
    • 86

    Mostly Sunny

Today 5 Sep Coastal Onslow

Mostly sunny. A chance of Showers and Thunderstorms this afternoon. Highs in the mid 90s. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent. Heat index Values up to 111.

Tonight 5 Sep Coastal Onslow

Mostly cloudy. Showers likely with a chance of Thunderstorms in the Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Patchy fog after midnight. Lows in the lower 70s. Southwest Winds 10 to 15 Mph, becoming west around 5 Mph after midnight. Chance of rain 70 percent.

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Onslow Beach Temperature Statistics

September Temperature

MCAS New River (13 miles)

  • Lowest 1 September, 2026

    73 °F

  • Average September

    81.6 °F

  • Highest 2 September, 2026

    93.9 °F

Climate (2021–2026)

MCAS New River (13 miles)

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  • Average Low 2021–2026

    54.4 °F

  • Average 2021–2026

    63.8 °F

  • Average High 2021–2026

    73.6 °F
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