Great Island Weather Forecast

    • 40
    • 44

    Rain Showers

    • 37
    • 45

    Partly Sunny

    • 38
    • 43

    Rain Likely

    • 32
    • 40

    Chance Rain

    • 33
    • 37

    Partly Sunny

    • 32
    • 42

    Chance Rain

Today 20 Mar Barnstable

Mostly sunny. Highs in the upper 40s. West Winds around 5 Mph, increasing to south 15 to 20 Mph with Gusts up to 35 Mph.

Tonight 20 Mar Barnstable

Showers. Lows in the upper 30s. Southwest Winds 15 to 20 Mph. Gusts up to 40 Mph, decreasing to 30 Mph after midnight. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Island Temperature Statistics

March Temperature

Hyannis, Barnstable Municipal-Boardman Airport (3.7 miles)

  • Lowest 2 March, 2026

    12.9 °F

  • Average March

    38.5 °F

  • Highest 9 March, 2026

    63 °F

Climate (2021–Present)

Hyannis, Barnstable Municipal-Boardman Airport (3.7 miles)

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  • Average Low 2021–2026

    44.9 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    59.5 °F
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