Sinclair Island Weather Forecast

    • 55
    • 64

    Slight Chance Rain

    • 55
    • 63

    Increasing Clouds

    • 54
    • 61

    Mostly Cloudy

    • 54
    • 63

    Mostly Sunny

    • 54
    • 64

    Mostly Sunny

    • 55
    • 65

    Mostly Sunny

    • 55
    • 65

    Mostly Sunny

Today 12 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Mostly cloudy. Highs in the mid 60s to lower 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 12 Sep Lowlands of Western Skagit and Northwestern Snohomish Counties

Cloudy in the Evening, then a slight chance of rain in the late evening and early morning. Cloudy with a chance of rain late in the night. Lows in the lower to mid 50s. West wind to 10 Mph becoming south after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sinclair Island Temperature Statistics

September Temperature

Eastsound, Orcas Island Airport (11.8 miles)

  • Lowest 6 September, 2026

    50 °F

  • Average September

    60 °F

  • Highest 2 September, 2026

    69.8 °F

Climate (2021–2026)

Eastsound, Orcas Island Airport (11.8 miles)

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    57.8 °F
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