Hampton Harbor - Knowles Island Weather Forecast

    • 49
    • 71

    Becoming Sunny

    • 54
    • 66

    Mostly Sunny

    • 61
    • 75

    Partly Sunny

    • 61
    • 71

    Chance Rain Showers

    • 57
    • 73

    Partly Sunny

    • 56
    • 68

    Chance Rain Showers

Today 14 Sep Coastal Rockingham

Partly sunny with a slight chance of Showers in the Morning, then sunny in the afternoon. Highs in the lower 70s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 14 Sep Coastal Rockingham

Clear. Lows in the upper 40s. Northwest Winds around 10 Mph with Gusts up to 20 Mph in the Evening, becoming light and variable.

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  • Temperature Real-Time

Hampton Harbor - Knowles Island Temperature Statistics

September Temperature

Pease Air Force Base / Portsmouth (13 miles)

  • Lowest 7 September, 2026

    54.5 °F

  • Average September

    67.2 °F

  • Highest 10 September, 2026

    86.5 °F

Climate (2021–2026)

Pease Air Force Base / Portsmouth (13 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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