Lewis Bay Weather Forecast

    • 59
    • 64

    Increasing Clouds

    • 63
    • 68

    Mostly Cloudy

    • 61
    • 70

    Chance Rain Showers

    • 58
    • 64

    Partly Sunny

    • 57
    • 62

    Chance Rain Showers

    • 51
    • 62

    Mostly Sunny

Today 30 Sep Barnstable

Mostly sunny. Highs in the mid 60s. North Winds around 5 Mph.

Tonight 30 Sep Barnstable

Mostly cloudy. Patchy fog after midnight. Lows in the upper 50s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lewis Bay Temperature Statistics

September Temperature

Hyannis, Barnstable Municipal-Boardman Airport (2.5 miles)

  • Lowest 16 September, 2026

    46.9 °F

  • Average September

    64.5 °F

  • Highest 10 September, 2026

    82 °F

Climate (2021–2026)

Hyannis, Barnstable Municipal-Boardman Airport (2.5 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    59.2 °F
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