Roche Harbor Lake Weather Forecast

    • 47
    • 58

    Increasing Clouds

    • 45
    • 55

    Rain

    • 44
    • 54

    Rain

    • 44
    • 52

    Rain

    • 44
    • 54

    Chance Rain

    • 44
    • 55

    Chance Rain

Today 5 Apr San Juan County

Partly sunny. Highs in the mid 50s to lower 60s. Light wind.

Tonight 5 Apr San Juan County

Mostly cloudy. Lows in the mid to upper 40s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Roche Harbor Lake Temperature Statistics

April Temperature

Friday Harbor Airport (6.2 miles)

  • Lowest 2 April, 2025

    37.9 °F

  • Average April

    48.7 °F

  • Highest 1 April, 2025

    57.9 °F

Climate (2020–Present)

Friday Harbor Airport (6.2 miles)

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  • Average Low 2020–2025

    44.3 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    59.2 °F
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