Alton Bay Weather Forecast

    • 56
    • 80

    Gradual Clearing

    • 57
    • 79

    Chance Rain Showers

    • 58
    • 70

    Rain Showers Likely

    • 60
    • 77

    Chance Rain Showers

    • 55
    • 78

    Slight Chance Rain Showers

    • 56
    • 76

    Mostly Sunny

Today 20 Aug Belknap

Partly sunny this Morning, then becoming mostly cloudy. Highs around 80. Light and variable Winds.

Tonight 20 Aug Belknap

Mostly cloudy with a slight chance of Showers in the Evening, then mostly clear after midnight. Lows in the mid 50s. Light and variable Winds. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Alton Bay Temperature Statistics

August Temperature

Laconia, Laconia Municipal Airport (11.2 miles)

  • Lowest 16 August, 2026

    51.1 °F

  • Average August

    72.5 °F

  • Highest 7 August, 2026

    91 °F

Climate (2021–2026)

Laconia, Laconia Municipal Airport (11.2 miles)

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  • Average Low 2021–2026

    39 °F

  • Average 2021–2026

    48.1 °F

  • Average High 2021–2026

    57 °F
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