Swan River Mouth Weather Forecast

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    • 65

    Chance Rain Showers

    • 57
    • 62

    Breezy

    • 57
    • 63

    Chance Rain Showers

    • 57
    • 64

    Rain Showers Likely

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    • 65

    Chance Rain Showers

Today 22 Sep Barnstable

Mostly cloudy this Morning, then becoming partly sunny. Near steady temperature in the lower 60s. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 22 Sep Barnstable

Mostly cloudy. Lows in the mid 50s. Northeast Winds 10 to 15 Mph with Gusts up to 30 Mph.

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Swan River Mouth Temperature Statistics

September Temperature

Hyannis, Barnstable Municipal-Boardman Airport (5.6 miles)

  • Lowest 16 September, 2026

    46.9 °F

  • Average September

    66.1 °F

  • Highest 10 September, 2026

    82 °F

Climate (2021–2026)

Hyannis, Barnstable Municipal-Boardman Airport (5.6 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    59.3 °F
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