Boston Harbor - Chelsea Weather Forecast

    • 57
    • 71

    Rain Showers Likely

    • 63
    • 80

    Partly Sunny

    • 58
    • 86

    Slight Chance Thunderstorms

    • 53
    • 71

    Partly Sunny

    • 53
    • 66

    Chance Rain Showers

    • 51
    • 67

    Partly Sunny

Today 25 May Suffolk

Showers. Areas of fog. Not as cool with Highs in the lower 70s. Northwest Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 25 May Suffolk

Partly cloudy. Lows in the upper 50s. West Winds 5 to 10 Mph.

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Boston Harbor - Chelsea Temperature Statistics

May Temperature

Boston, Logan International Airport (1.9 miles)

  • Lowest 9 May, 2026

    42.7 °F

  • Average May

    60.8 °F

  • Highest 19 May, 2026

    96.7 °F

Climate (2021–Present)

Boston, Logan International Airport (1.9 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    60.9 °F
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