Great Bay - Nannie Island Weather Forecast

    • 51
    • 61

    Rain

    • 48
    • 66

    Partly Sunny

    • 47
    • 59

    Mostly Cloudy

    • 47
    • 59

    Partly Sunny

    • 48
    • 59

    Chance Rain Showers

    • 50
    • 60

    Chance Rain Showers

Today 20 Sep Coastal Rockingham

Mostly cloudy. Rain likely this afternoon. Highs in the lower 60s. Light and variable Winds. Chance of rain 70 percent.

Tonight 20 Sep Coastal Rockingham

Rain. Lows in the upper 40s. Light and variable Winds, becoming north around 10 Mph after midnight. Chance of rain 90 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Bay - Nannie Island Temperature Statistics

September Temperature

Pease Air Force Base / Portsmouth (2.5 miles)

  • Lowest 15 September, 2026

    45.1 °F

  • Average September

    66 °F

  • Highest 10 September, 2026

    86.5 °F

Climate (2021–2026)

Pease Air Force Base / Portsmouth (2.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    42.3 °F

  • Average 2021–2026

    50.7 °F

  • Average High 2021–2026

    59.2 °F
Get WillyWeather+ to remove ads