San Juan Island - Cattle Point Lighthouse Weather Forecast

    • 55
    • 75

    Partly Sunny

    • 53
    • 78

    Increasing Clouds

    • 52
    • 71

    Mostly Cloudy

    • 52
    • 70

    Mostly Cloudy

    • 51
    • 63

    Chance Rain

    • 50
    • 61

    Mostly Cloudy

    • 50
    • 60

    Mostly Cloudy

Today 24 Aug San Juan County

Sunny. Patchy fog in the morning. Highs in the 70s. Light wind becoming north around 10 Mph in the afternoon.

Tonight 24 Aug San Juan County

Mostly clear. Lows in the 50s to lower 60s. Northwest wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Juan Island - Cattle Point Lighthouse Temperature Statistics

August Temperature

Friday Harbor Airport (5.6 miles)

  • Lowest 3 August, 2026

    48.9 °F

  • Average August

    60.1 °F

  • Highest 4 August, 2026

    78.1 °F

Climate (2021–2026)

Friday Harbor Airport (5.6 miles)

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  • Average Low 2021–2026

    44.5 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    59.6 °F
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