South Yarmouth Weather Forecast

    • 45
    • 52

    Rain Showers Likely

    • 36
    • 53

    Rain Showers

    • 36
    • 43

    Chance Rain Showers

    • 44
    • 53

    Mostly Cloudy

    • 41
    • 53

    Slight Chance Rain Showers

    • 40
    • 55

    Chance Rain Showers

Today 31 Mar Barnstable

Mostly cloudy with Showers likely this Morning, then partly sunny with a chance of Showers this afternoon. Patchy fog this morning. Highs around 50. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

Tonight 31 Mar Barnstable

Mostly cloudy. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Near steady temperature in the mid 40s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 40 percent.

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South Yarmouth Temperature Statistics

March Temperature

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

  • Lowest 2 March, 2026

    12.9 °F

  • Average March

    38.8 °F

  • Highest 9 March, 2026

    63 °F

Climate (2021–Present)

Hyannis, Barnstable Municipal-Boardman Airport (4.3 miles)

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  • Average Low 2021–2026

    44.9 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    59.4 °F
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