Cypress Island - Secret Harbor Weather Forecast

    • 51
    • 68

    Mostly Sunny

    • 51
    • 66

    Partly Sunny

    • 50
    • 63

    Partly Sunny

    • 52
    • 64

    Partly Sunny

    • 53
    • 64

    Partly Sunny

    • 52
    • 62

    Slight Chance Rain

Today 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Sunny. Highs in the upper 60s to mid 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 17 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly clear. Lows in the upper 40s to mid 50s. North wind to 10 Mph becoming east after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Cypress Island - Secret Harbor Temperature Statistics

September Temperature

Burlington/Mount Vernon, Skagit Regional Airport (13.7 miles)

  • Lowest 3 September, 2026

    50 °F

  • Average September

    60 °F

  • Highest 9 September, 2026

    75.2 °F

Climate (2021–2026)

Burlington/Mount Vernon, Skagit Regional Airport (13.7 miles)

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

  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    59.2 °F
Get WillyWeather+ to remove ads