Roche Harbor Lake Weather Forecast

    • 50
    • 69

    Chance Rain

    • 51
    • 70

    Partly Sunny

    • 51
    • 70

    Mostly Cloudy

    • 50
    • 69

    Mostly Cloudy

    • 50
    • 69

    Mostly Cloudy

    • 49
    • 68

    Chance Rain

Today 26 Jun San Juan County

Cloudy with rain likely in the Morning, then mostly cloudy with a chance of rain in the afternoon. Rainfall Amounts less than a tenth of an inch likely. Highs in the 60s to lower 70s. South wind around 10 Mph with Gusts to 20 Mph becoming southwest in the afternoon.

Tonight 26 Jun San Juan County

Mostly cloudy. A chance of rain until early Morning, then a slight chance of rain in the morning. Lows in the upper 40s to mid 50s. Southwest wind to 10 Mph. Gusts to 20 Mph in the evening.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Roche Harbor Lake Temperature Statistics

June Temperature

Friday Harbor Airport (6.2 miles)

  • Lowest 1 June, 2026

    44.1 °F

  • Average June

    59.3 °F

  • Highest 23 June, 2026

    86 °F

Climate (2021–2026)

Friday Harbor Airport (6.2 miles)

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

  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    59.8 °F
Get WillyWeather+ to remove ads