Boston Harbor - Chelsea Weather Forecast

    • 56
    • 66

    Rain Likely

    • 54
    • 59

    Rain

    • 56
    • 63

    Rain

    • 55
    • 61

    Rain Showers

    • 55
    • 64

    Mostly Cloudy

    • 57
    • 67

    Mostly Cloudy

Today 25 Sep Suffolk

Partly Sunny, then mostly cloudy with a chance of rain. Breezy with Highs in the upper 60s. Northeast Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 30 percent.

Tonight 25 Sep Suffolk

Cloudy with a 50 percent chance of rain. Patchy fog after midnight. Lows in the mid 50s. Northeast Winds 15 to 20 Mph with Gusts up to 45 Mph.

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  • Temperature Real-Time

Boston Harbor - Chelsea Temperature Statistics

September Temperature

Boston, Logan International Airport (1.9 miles)

  • Lowest 23 September, 2026

    51.1 °F

  • Average September

    67 °F

  • Highest 10 September, 2026

    87.7 °F

Climate (2021–2026)

Boston, Logan International Airport (1.9 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    61 °F
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