Boston Harbor - Boston Main Channel Weather Forecast

    • 40
    • 48

    Chance Rain

    • 36
    • 49

    Rain Likely

    • 30
    • 39

    Chance Snow

    • 34
    • 43

    Mostly Cloudy

    • 33
    • 47

    Chance Rain

    • 38
    • 47

    Mostly Cloudy

Today 21 Mar Suffolk

Partly sunny. A slight chance of rain in the morning. Patchy fog in the morning. Highs in the lower 50s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 20 percent.

Tonight 21 Mar Suffolk

Mostly cloudy with a 40 percent chance of Showers. Not as cool. Near steady temperature in the mid 40s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Boston Harbor - Boston Main Channel Temperature Statistics

March Temperature

Boston, Logan International Airport (0.6 miles)

  • Lowest 2 March, 2026

    12.7 °F

  • Average March

    40.7 °F

  • Highest 10 March, 2026

    75.7 °F

Climate (2021–Present)

Boston, Logan International Airport (0.6 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    61 °F
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