Great Island Weather Forecast

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    Rain Showers

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    • 55

    Rain Showers

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    • 54

    Mostly Sunny

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    • 54

    Rain Showers Likely

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    • 57

    Rain Showers Likely

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    Rain Showers Likely

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    Partly Sunny

Today 6 May Barnstable

Mostly cloudy. A chance of Showers this afternoon. Highs in the mid 60s. Southwest Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 40 percent.

Tonight 6 May Barnstable

Showers with a slight chance of Thunderstorms this Evening, then Showers likely after midnight. Patchy fog. Lows in the lower 50s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Island Temperature Statistics

May Temperature

Hyannis, Barnstable Municipal-Boardman Airport (3.7 miles)

  • Lowest 3 May, 2026

    37.9 °F

  • Average May

    51 °F

  • Highest 4 May, 2026

    63 °F

Climate (2021–Present)

Hyannis, Barnstable Municipal-Boardman Airport (3.7 miles)

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  • Average Low 2021–2026

    44.8 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    59.3 °F
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