Portsmouth Weather Forecast

    • 65
    • 74

    Chance Rain Showers

    • 64
    • 75

    Rain Showers Likely

    • 62
    • 78

    Mostly Cloudy

    • 63
    • 82

    Partly Sunny

    • 59
    • 80

    Chance Rain Showers

    • 59
    • 79

    Partly Sunny

    • 60
    • 77

    Partly Sunny

Today 16 Aug Coastal Rockingham

Partly sunny. Highs in the upper 70s. Southeast Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 16 Aug Coastal Rockingham

Partly cloudy with a slight chance of Showers in the Evening, then mostly cloudy with a chance of Showers after midnight. Lows in the mid 60s. South Winds around 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portsmouth Temperature Statistics

August Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 14 August, 2026

    62.2 °F

  • Average August

    76 °F

  • Highest 7 August, 2026

    91.4 °F

Climate (2021–2026)

Pease Air Force Base / Portsmouth (3.1 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    59.2 °F
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