San Juan Island - Cattle Point Lighthouse Weather Forecast

    • 51
    • 67

    Increasing Clouds

    • 48
    • 67

    Rain Likely

    • 49
    • 66

    Partly Sunny

    • 51
    • 69

    Mostly Sunny

    • 50
    • 66

    Partly Sunny

    • 48
    • 63

    Partly Sunny

    • 48
    • 59

    Partly Sunny

Today 24 May San Juan County

Mostly sunny. Highs in the 60s. South wind to 10 Mph.

Tonight 24 May San Juan County

Mostly cloudy. Lows in the upper 40s to mid 50s. Light wind becoming southeast to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Juan Island - Cattle Point Lighthouse Temperature Statistics

May Temperature

Friday Harbor Airport (5.6 miles)

  • Lowest 17 May, 2026

    41 °F

  • Average May

    55 °F

  • Highest 3 May, 2026

    75.9 °F

Climate (2021–Present)

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

    59.7 °F
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