Great Island Weather Forecast

    • 56
    • 65

    Rain Likely

    • 53
    • 62

    Chance Rain Showers

    • 58
    • 62

    Breezy

    • 58
    • 62

    Chance Rain Showers

    • 59
    • 62

    Rain Showers Likely

    • 59
    • 65

    Chance Rain Showers

Today 21 Sep Barnstable

Mostly cloudy. A chance of rain this morning. Patchy fog this morning. Near steady temperature in the mid 60s. Northeast Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 21 Sep Barnstable

Mostly cloudy. Lows in the mid 50s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Island Temperature Statistics

September Temperature

Hyannis, Barnstable Municipal-Boardman Airport (3.7 miles)

  • Lowest 16 September, 2026

    46.9 °F

  • Average September

    66.5 °F

  • Highest 10 September, 2026

    82 °F

Climate (2021–2026)

Hyannis, Barnstable Municipal-Boardman Airport (3.7 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    59.3 °F
Get WillyWeather+ to remove ads