Portsmouth Weather Forecast

    • 41
    • 52

    Slight Chance Rain

    • 33
    • 48

    Rain

    • 28
    • 48

    Partly Sunny

    • 34
    • 46

    Partly Sunny

    • 36
    • 51

    Slight Chance Rain Showers

    • 39
    • 57

    Partly Sunny

    • 39
    • 56

    Partly Sunny

Today 18 Apr Coastal Rockingham

Areas of fog this morning. Mostly cloudy. Highs in the lower 50s. East Winds around 10 Mph.

Tonight 18 Apr Coastal Rockingham

Cloudy. Patchy drizzle this Evening, then a slight chance of rain after midnight. Patchy fog this Evening, then Areas of fog after midnight. Lows in the lower 40s. East Winds around 10 Mph with Gusts up to 20 Mph this Evening, becoming light and variable. Chance of rain 20 percent.

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Portsmouth Temperature Statistics

April Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 8 April, 2026

    26.2 °F

  • Average April

    45.4 °F

  • Highest 13 April, 2026

    70.3 °F

Climate (2021–Present)

Pease Air Force Base / Portsmouth (3.1 miles)

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  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.6 °F

  • Average High 2021–2026

    59.1 °F
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