Roche Harbor SPB Weather Forecast

    • 52
    • 64

    Slight Chance Rain

    • 52
    • 65

    Chance Rain

    • 52
    • 66

    Mostly Sunny

    • 52
    • 68

    Partly Sunny

    • 52
    • 64

    Partly Sunny

    • 53
    • 66

    Partly Sunny

Today 4 Sep San Juan County

Partly sunny. Highs in the 60s. Light wind.

Tonight 4 Sep San Juan County

Mostly cloudy. A slight chance of Showers after midnight. Lows in the upper 40s to mid 50s. Light wind.

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  • Temperature Real-Time

Roche Harbor SPB Temperature Statistics

September Temperature

Friday Harbor Airport (8.1 miles)

  • Lowest 1 September, 2026

    50 °F

  • Average September

    58 °F

  • Highest 2 September, 2026

    64.9 °F

Climate (2021–2026)

Friday Harbor Airport (8.1 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    59.7 °F
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