Portsmouth Weather Forecast

    • 58
    • 71

    Mostly Cloudy

    • 56
    • 70

    Chance Rain Showers

    • 54
    • 72

    Mostly Sunny

    • 57
    • 77

    Mostly Sunny

    • 61
    • 80

    Partly Sunny

    • 63
    • 79

    Chance Rain Showers

Today 19 Aug Coastal Rockingham

Partly sunny. Highs in the lower 70s. Light and variable Winds.

Tonight 19 Aug Coastal Rockingham

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portsmouth Temperature Statistics

August Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 2 August, 2025

    54.3 °F

  • Average August

    72.6 °F

  • Highest 12 August, 2025

    93.9 °F

Climate (2020–Present)

Pease Air Force Base / Portsmouth (3.1 miles)

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  • Average Low 2020–2025

    42.6 °F

  • Average 2020–2025

    50.9 °F

  • Average High 2020–2025

    59.4 °F
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