Arcata Bay Weather Forecast

    • 56
    • 57

    Mostly Cloudy

    • 58
    • 63

    Partly Sunny

    • 58
    • 64

    Partly Sunny

    • 59
    • 65

    Partly Sunny

    • 58
    • 66

    Partly Sunny

    • 55
    • 62

    Mostly Cloudy

Today 4 Oct Northern Coastal Humboldt

Mostly cloudy. Highs 71 to 86. Northwest wind around 5 Mph.

Tonight 4 Oct Northern Coastal Humboldt

Mostly cloudy in the evening then becoming partly cloudy. Lows 53 to 63. North wind around 5 Mph.

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Arcata Bay Temperature Statistics

October Temperature

Arcata / Eureka, Arcata Airport (9.3 miles)

  • Lowest 2 October, 2026

    48 °F

  • Average October

    53.9 °F

  • Highest 1 October, 2026

    60.1 °F

Climate (2021–2026)

Arcata / Eureka, Arcata Airport (9.3 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    59.7 °F
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