Rosario Beach Weather Forecast

    • 58
    • 74

    Increasing Clouds

    • 57
    • 73

    Mostly Sunny

    • 57
    • 73

    Mostly Sunny

    • 56
    • 72

    Mostly Sunny

    • 56
    • 71

    Partly Sunny

    • 55
    • 69

    Mostly Cloudy

Today 23 Aug Lowlands of Western Skagit and Northwestern Snohomish Counties

Sunny. Highs in the 80s. Northwest wind to 10 Mph increasing to 10 to 15 Mph in the afternoon.

Tonight 23 Aug Lowlands of Western Skagit and Northwestern Snohomish Counties

Partly cloudy. Lows in the upper 50s to mid 60s. Northwest wind 10 to 15 Mph becoming north after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rosario Beach Temperature Statistics

August Temperature

Whidbey Island Naval Air Station - Ault Field (4.3 miles)

  • Lowest 8 August, 2025

    52 °F

  • Average August

    60.3 °F

  • Highest 10 August, 2025

    82 °F

Climate (2020–Present)

Whidbey Island Naval Air Station - Ault Field (4.3 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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