Great Island Weather Forecast

    • 65
    • 71

    Mostly Sunny

    • 66
    • 71

    Rain Showers

    • 65
    • 70

    Slight Chance Rain Showers

    • 66
    • 71

    Mostly Sunny

    • 66
    • 70

    Partly Sunny

    • 67
    • 72

    Slight Chance Rain Showers

Today 21 Jun Barnstable

Mostly clear. Lows in the mid 60s. Highs in the lower 80s.

Tonight 21 Jun Barnstable

Partly cloudy. Lows in the mid 60s.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Great Island Temperature Statistics

June Temperature

Hyannis, Barnstable Municipal-Boardman Airport (3.7 miles)

  • Lowest 2 June, 2026

    37 °F

  • Average June

    66.8 °F

  • Highest 12 June, 2026

    84 °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

    44.8 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    59.3 °F
Get WillyWeather+ to remove ads