Lopez Island - Cape Saint Mary Weather Forecast

    • 56
    • 73

    Becoming Sunny

    • 57
    • 77

    Increasing Clouds

    • 55
    • 72

    Chance Rain

    • 54
    • 69

    Partly Sunny

    • 54
    • 66

    Mostly Cloudy

    • 53
    • 64

    Chance Rain

    • 53
    • 64

    Slight Chance Rain

Today 21 Jul San Juan County

Mostly sunny. Patchy smoke. Highs in the upper 70s to mid 80s. Light wind.

Tonight 21 Jul San Juan County

Mostly clear. Lows in the mid 50s to lower 60s. Light wind.

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Lopez Island - Cape Saint Mary Temperature Statistics

July Temperature

Whidbey Island Naval Air Station - Ault Field (8.7 miles)

  • Lowest 14 July, 2026

    46 °F

  • Average July

    56.3 °F

  • Highest 13 July, 2026

    66 °F

Climate (2021–2026)

Whidbey Island Naval Air Station - Ault Field (8.7 miles)

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  • Average Low 2021–2026

    44.4 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    56 °F
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