Lummi Island - Bumstead Spit Weather Forecast

    • 56
    • 66

    Decreasing Clouds

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    • 67

    Partly Sunny

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    • 67

    Mostly Sunny

    • 56
    • 67

    Partly Sunny

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    Mostly Sunny

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    Partly Sunny

Today 9 Aug Lowlands of Western Whatcom County

Mostly sunny. Highs in the upper 60s to mid 70s. South wind to 10 Mph becoming southwest around 10 Mph in the afternoon.

Tonight 9 Aug Lowlands of Western Whatcom County

Mostly cloudy in the evening then becoming mostly clear. Patchy fog in the morning. Lows in the 50s. Southwest wind to 10 Mph becoming south after midnight.

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Lummi Island - Bumstead Spit Temperature Statistics

August Temperature

Bellingham, Bellingham International Airport (8.1 miles)

  • Lowest 3 August, 2026

    46.7 °F

  • Average August

    63.9 °F

  • Highest 6 August, 2026

    80.7 °F

Climate (2021–2026)

Bellingham, Bellingham International Airport (8.1 miles)

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  • Average Low 2021–2026

    43.9 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    59.1 °F
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