Boston Harbor - Charlestown Weather Forecast

    • 73
    • 92

    Slight Chance Thunderstorms

    • 72
    • 89

    Rain Showers Likely

    • 68
    • 89

    Mostly Sunny

    • 71
    • 88

    Partly Sunny

    • 69
    • 87

    Chance Rain Showers

    • 67
    • 83

    Slight Chance Rain Showers

Today 7 Aug Suffolk

Sunny. A slight chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the lower 90s. Southwest Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 101.

Tonight 7 Aug Suffolk

Mostly clear. Near steady temperature in the mid 70s. Southwest Winds around 5 Mph.

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Boston Harbor - Charlestown Temperature Statistics

August Temperature

Boston, Logan International Airport (1.9 miles)

  • Lowest 4 August, 2026

    66.9 °F

  • Average August

    77.2 °F

  • Highest 4 August, 2026

    87.1 °F

Climate (2021–2026)

Boston, Logan International Airport (1.9 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    61 °F
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