Boulder Island Weather Forecast

    • 54
    • 65

    Increasing Clouds

    • 54
    • 64

    Becoming Sunny

    • 54
    • 66

    Mostly Sunny

    • 53
    • 65

    Partly Sunny

    • 53
    • 62

    Mostly Cloudy

    • 53
    • 63

    Partly Sunny

    • 53
    • 63

    Mostly Sunny

Today 21 Jul San Juan County

Sunny. Highs in the upper 60s to mid 70s. Light wind becoming south to 10 Mph in the afternoon.

Tonight 21 Jul San Juan County

Partly cloudy. Lows in the 50s. South wind to 10 Mph. Gusts to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Boulder Island Temperature Statistics

July Temperature

Whidbey Island Naval Air Station - Ault Field (8.1 miles)

  • Lowest 4 July, 2025

    48 °F

  • Average July

    57.3 °F

  • Highest 16 July, 2025

    77 °F

Climate (2020–Present)

Whidbey Island Naval Air Station - Ault Field (8.1 miles)

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  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    50.2 °F

  • Average High 2020–2025

    56.2 °F
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