Harry A. Merlo State Recreation Area Weather Forecast

    • 45
    • 64

    Partly Sunny

    • 45
    • 62

    Partly Sunny

    • 48
    • 66

    Mostly Sunny

    • 49
    • 65

    Partly Sunny

    • 48
    • 64

    Partly Sunny

    • 47
    • 60

    Partly Sunny

Today 19 May Northern Humboldt Coast

Sunny. Patchy fog in the morning. Highs 62 to 72. Northwest wind 5 to 15 Mph.

Tonight 19 May Northern Humboldt Coast

Mostly cloudy. Patchy fog overnight. Lows 43 to 53. North wind around 10 Mph.

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Harry A. Merlo State Recreation Area Temperature Statistics

May Temperature

Arcata / Eureka, Arcata Airport (14.3 miles)

  • Lowest 14 May, 2026

    44.7 °F

  • Average May

    54.5 °F

  • Highest 10 May, 2026

    62.7 °F

Climate (2021–Present)

Arcata / Eureka, Arcata Airport (14.3 miles)

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  • Average Low 2021–2026

    45.7 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    59.6 °F
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