Boston Harbor - Chelsea Weather Forecast

    • 47
    • 62

    Increasing Clouds

    • 51
    • 63

    Slight Chance Rain Showers

    • 49
    • 63

    Rain Showers

    • 49
    • 62

    Chance Rain Showers

    • 55
    • 73

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

Today 12 May Suffolk

Sunny. Highs in the lower 60s. North Winds 5 to 10 Mph.

Tonight 12 May Suffolk

Mostly clear in the Evening, then becoming mostly cloudy. Lows in the mid 40s. Southwest Winds around 5 Mph.

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  • Temperature Real-Time

Boston Harbor - Chelsea Temperature Statistics

May Temperature

Boston, Logan International Airport (1.9 miles)

  • Lowest 3 May, 2026

    44.7 °F

  • Average May

    56.9 °F

  • Highest 5 May, 2026

    79.6 °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

    61 °F
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