Portsmouth Weather Forecast

    • 75
    • 91

    Thunderstorms

    • 77
    • 91

    Thunderstorms Likely

    • 78
    • 95

    Chance Thunderstorms

    • 73
    • 88

    Slight Chance Thunderstorms

    • 73
    • 86

    Mostly Sunny

    • 73
    • 88

    Partly Sunny

Today 18 Jul Norfolk/Portsmouth

Partly sunny with a chance of Showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall. Highs around 90. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 102.

Tonight 18 Jul Norfolk/Portsmouth

Mostly cloudy. Showers and Thunderstorms, mainly in the evening. Some Thunderstorms may produce heavy rainfall. Humid with Lows in the mid 70s. Southeast Winds 5 to 10 Mph, becoming southwest after midnight. Chance of rain 80 percent.

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Portsmouth Temperature Statistics

July Temperature

Norfolk, Naval Air Station (6.8 miles)

  • Lowest 5 July, 2025

    67.6 °F

  • Average July

    81.4 °F

  • Highest 8 July, 2025

    96.7 °F

Climate (2020–Present)

Norfolk, Naval Air Station (6.8 miles)

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  • Average Low 2020–2025

    55.5 °F

  • Average 2020–2025

    63.2 °F

  • Average High 2020–2025

    71.2 °F
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