Portsmouth Weather Forecast

    • 53
    • 65

    Mostly Sunny

    • 68
    • 87

    Partly Sunny

    • 50
    • 86

    Chance Rain Showers

    • 45
    • 64

    Mostly Sunny

    • 46
    • 64

    Chance Rain Showers

    • 45
    • 59

    Chance Rain Showers

    • 46
    • 59

    Chance Rain Showers

Today 18 May Coastal Rockingham

Partly sunny. Highs in the upper 60s. Southeast Winds around 10 Mph.

Tonight 18 May Coastal Rockingham

Mostly clear. Lows in the mid 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Portsmouth Temperature Statistics

May Temperature

Pease Air Force Base / Portsmouth (3.1 miles)

  • Lowest 9 May, 2026

    38.1 °F

  • Average May

    55.1 °F

  • Highest 5 May, 2026

    80.4 °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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