Alton Bay SPB Weather Forecast

    • 38
    • 55

    Rain Likely

    • 45
    • 67

    Chance Rain Showers

    • 44
    • 62

    Chance Rain Showers

    • 45
    • 66

    Chance Rain Showers

    • 49
    • 68

    Slight Chance Rain Showers

Today 30 May Belknap

Rain this Morning, then a slight chance of Showers this afternoon. Highs in the lower 50s. Northeast Winds 15 to 25 Mph. Gusts up to 45 Mph, decreasing to 35 Mph this afternoon. Chance of rain near 100 percent.

Tonight 30 May Belknap

Partly cloudy in the Evening, then clearing. Lows in the upper 30s. North Winds around 10 Mph with Gusts up to 20 Mph in the Evening, becoming light and variable.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Alton Bay SPB Temperature Statistics

May Temperature

Laconia, Laconia Municipal Airport (10.6 miles)

  • Lowest 8 May, 2026

    32 °F

  • Average May

    56.1 °F

  • Highest 19 May, 2026

    89.1 °F

Climate (2021–Present)

Laconia, Laconia Municipal Airport (10.6 miles)

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

  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    48 °F

  • Average High 2021–2026

    56.9 °F
Get WillyWeather+ to remove ads